Observations Of Chemical Reactions Lab Answers





While I present the reactions students will make qualitative observations and come up with a list of chemical reaction indicators. The assignment was to create a formal lab report that expresses data and observations, lab procedure, and a discussion of the data with a conclusion. TYPES OF CHEMICAL REACTIONS LAB PART #2. All glassware used must be rinsed in order to be used in following reactions. Give an example of a combination reaction from an experiment you have done in Pi say. To write a chemical reaction. In Part B of the lab (Week 2), you will conduct a series of experiments to distinguish between the remaining functional group possibilities to uniquely identify the functional group on your unknown compound. Synthesis is, in essence, the reversal of a decomposition reaction. 1 A Model for Reaction Rates MAIN Idea Collision theory is the key to understanding why some reactions are faster than others. Five Types of Chemical Reaction Worksheet Answers. Be sure to discuss with the students how these chemical reactions affect their lives during or right after the demonstrations and/or experiments. In this lab, Alka-Seltzer (an antacid that prevents upset stomachs, acid indigestion and headaches), inspired me to create an experiment on it. (C) classify reactions as exothermic or endothermic and represent energy changes that occur in chemical reactions using thermochemical equations or graphical analysis; and (D) perform calculations involving heat, mass, temperature change, and specific heat. Chemical Reactions. Add ~100 mL DI water to the beaker; then add ~30 mL 3. Chemical reactions in the engines of cars and buses provide the energy to power the vehicles. • Once a reaction has reached equilibrium, the rate of reaction is constant provided the temperature remains constant. Consider the following balanced equation and answer parts (a) through (f). ' This may be as a result of the reaction being exothermic, so the products are more stable than the reactants, or could be a result of an increase in entropy (products more disordered than the reactants), or both of these. Pre-lab Questions Michelangelo used fresco painting when he painted the Sistine Chapel. You will examine reactions of hydrochloric acid with magnesium metal, with solid calcium carbonate, and with aqueous sodium hydrogen carbonate. What we see, smell, feel, and hear are observations that scientists depend on to determine whether chemical reactions have been occurring or have come to completion. Observations of Chemical Changes Submitted by Date Submitted: 5/30/2012 Date Performed: 5/30/2012 Lab Section: Chem-181DL1 Course Instructor: Purpose The purpose of the experiment Observation of Chemical Changes is to examine the properties of chemical reaction and relate those reactions to products commonly found in a home environment. The Periodic Table of the Elements grouped elements according to their increasing mass (a physical property) and by columns (similar chemical properties). Listed below are some of the reactions used in creating a Fresco painting. Experiment 1. These are synthesis, decomposition,. > Combination Reaction: When two or more reactants react together chemically to form a single product, the reaction is called combination reaction. Chemical bonding - Chemical bonding - The law of conservation of mass: The crucial transformation of chemistry from a collection of vain hopes and alchemical meddlings to a corpus of reliable quantitative knowledge hinged on the contributions of the French aristocrat Antoine-Laurent Lavoisier (and his wife, Marie-Anne), shortly before he lost his head to the guillotine at the height of the. Some of the reaction you will perform; others will be demonstrated by your teacher. AP Chemistry Lab #13 Page 1 of 8. In today's experiment be sure to make observations BEFORE and AFTER reactants are mixed so you can evaluate the four signs of a chemical reaction accurately. Introduction to Chemical Reactions A single replacement reaction is a type of reaction where the more reactive metal replaces the less reactive metal dissolved in the solution. Find out the role and chemical reactions of the following reagents in the blood glucose level determination by glucose oxidase method. State five observations you will make when chemical reactions are occurring. To use physical and chemical properties to identify an unknown. Change the following word equations to balanced chemical equations. These visible changes are called the indicators of a chemical reaction. Exercise 1: Observations of a Chemical Change Data Table 1. Five unlabeled bottles. Stoichiometry: P123-129. Write a balanced chemical reaction for each of the reaction observed. the central lab table, which is a chemical-free area. (c) The reaction of potassium with water. There are two types of observations. A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. 3A: Chemical Kinetics: Assignment 2 11 Appendix 3. Lab 6-1 Purpose: Comparing Chemical Reactions 10 Full Name: Clean up: Block. What is observed when carbon dioxide gas is passed through lime water. The reactants and products for each chemical reaction are provided in Table L4. chemistry practical class 10 Types of Reactions Introduction > Chemical reaction: The reaction in which two or more substances react to form a new product with new properties is called a chemical reaction. Original Document: Enzyme Lab. In this lab, we tested this by putting copper through five different reactions and many phase. Materials: Petri dish with cover, Pencil, Paper, Cotton swab, beakers of ice and warm water. RATES OF CHEMICAL REACTIONS Name _____ LABORATORY REPORT Date _____ A. However, assuming the mixture is in contact with air free of carbon dioxide (not that such thing exist in nature) dissolution reaction is not impossible (hint: LeChatelier's principle, you are removing one of the products). What is this substance, and where did it come from? As a student chemist you will help Dr. Start studying Pre-lab Quiz 1: Observing a Chemical Reaction. Chemical reactions lab report answers Chemical reactions lab report answers. Write the chemical equation for the reaction in well A6. The interaction of the hydrochloric acid and zinc is called an oxidation-reduction reaction. When the car undergoes a head-on collision, a series of three chemical reactions inside the gas generator produce gas (N 2 ) to fill the airbag and convert NaN 3 , which is highly toxic (The maximum concentration. Chemical Equilibrium and Le Chatelier's Principle. It was done in June, a few weeks before our final exams. The Reaction of Magnesium with Hydrochloric Acid In this experiment you will determine the volume of the hydrogen gas that is produced when a sample of magnesium reacts with hydrochloric acid. You will follow the procedures given below and then write a balanced chemical equation for each reaction. Orange ppt (D. Identify each reaction as endothermic or exothermic. Experiment 6 Chemical Reactions OUTCOMES After completing this experiment, the student should be able to: be familiar with a variety of reactions including precipitation, acid-base, gas forming, and oxidation-reduction reactions. Reaction Rates Chapter 16 • Reaction Rates 559 SStart-Up Activitiestart-Up Activities LAUNNCH CH LLabab How can you accelerate a reaction? Some chemical reactions go so slowly that nothing seems to be happening. But the rate of weathering is dependent on a number of factors. First, while the oscillations occur, the chemical. the temperature changed from room temperature to hot). • Answer the pre-lab questions that appear at the end of this lab exercise. (Fast reactions have a short reaction time, while slow reactions take a long time. Objectives: • Identify different types of chemical reactions • Predict the products of reactions • Understand and balance chemical equations. Metal + Oxygen à Metal oxide a. Every time you cook or clean, it's chemistry in action. Write balanced chemical equations for all reactions carried out 3. A chemical reaction occurs when a substance is rearranged to form a new substance. Make observations of the mixture from the moment the chemicals are mixed for ~ 2 minutes. This states that in a chemical reaction, matter can neither be created or destroyed, or more simply, the mass of the products must equal the mass of the reactants. If two substances combine to form one product, a synthesis reaction has occurred. The first observation in well A1 resulted in NaCl + H2O + CO2 (g). however, adding too much heat will cause the enzymes to denature and lose their function. Materials Needed: “Patriotic Colors” Lab Kit straw Chemicals. Such a change. Use some or all of the following terms in your description: atom, molecule, particle, collision, effective collision, speed, energy, orientation, reactants, and products. might distinguish one compound from another. 2 Fe atoms would provide the proper iron atom inventory. These observations should include: observations of the reactant(s) before the reaction observations of the reaction mixture during the reaction observations of the product(s. A combination (composition) reaction A chemical reaction that makes a single substance from two or more reactants. Reaction 2. Point this out as an example of a chemical reaction in which a precipitate forms to the students. Chemical Reactions and Equations Class 10 Science Chapter 1 as per NCERT Book used in CBSE and other Schools. Purpose: The purpose of this experiment is to demonstrate a cycle of reactions involving copper. Other reactions release energy into. Write a summary paragraph that demonstrates that you have mastered the learning goal. This is a HUGE question to answer completely! One answer is 'because they result in a negative change in free energy, delta-G. State five observations you will make when chemical reactions are occurring. The reaction is: 2 H. Listen to the safety rules for today's experiment. The reaction series includes single replacement, double replacement, synthesis, and decomposition reactions. Examine a piece of magnesium ribbon about 3 inches in length. Chemical reactions lab report answers Chemical reactions lab report answers. Use complete sentences. The lab requires about 2 class periods or 1 block to complete. The production of light and heat is evidence for a chemical reaction. Thus, we call these reactions catabolic and exothermic. Lab: Types of Chemical Reactions (get results/observations from someone in class - it's due tomorrow) Balancing Equations, Reaction Types Review (Only pages 1-3 to be completed) Answer Key (Change page no. have heard chemical changes referred to as chemical reactions, and you may even be able to describe some of the evidence to look for to tell if a chemical reaction has occurred. However, rather than requiring energy, this process involves the breakdown of molecules (e. Part A of lab (preparation of copper (II) nitrate from copper metal). Reaction: Balanced Chemical Reaction: Sign of Chemical Reaction: Type of Chemical Reaction: KI(aq) + Ag(aq) → KNO3(aq) + AgI(s) KI(aq) + Ag(aq) → KNO3(aq) + AgI(s) Change in colour: into an opaque yellow. reactants. CO2 + 18. ˜0’,+//L˜ ,. Concepts • Scientific method • Chemical reactions • Experiment • Observation • Chemical versus physical change • Scientific design. Although in science the term ‘chemical change’ is reserved for processes in which the reacting chemical substances disappear and other (new) substances appear, several studies have found that children often use the term ‘chemical change’ to encompass changes in physical states and other. answers to each question. 1 Al KMnO4 10 M NaOH 0. This week in lab you will examine a few different types of redox reactions, including making a series of electrochemical cells and performing a couple of small redox reactions. The assignment was to create a formal lab report that expresses data and observations, lab procedure, and a discussion of the data that leads to a conclusion. Oxygen from the water molecules is given off in the process. Lab 15: Chemical Reactions II The unbalanced chemical equation for the decomposition reaction that you will observe in this lab is: (NH4)2CO3 (s) → NH3 (g) + H2O(g) + CO2(g) As shown, the ammonium carbonate decomposes when heated to form three gases: ammonia, water vapor, and carbon dioxide. In the reaction carried out in this lab the CaCO 3 forms by the chemical reaction of sodium carbonate with calcium chloride. Write the chemical equation for the reaction in well A6. 2 Equilibrium Calculations SG 18. Making careful observations is a critical skill that you will employ throughout the year while doing experiments. • Answer the pre-lab questions that appear at the end of this lab exercise. Other reactions release energy into. A quantitative observation is an observation that involves a measurement; a qualitative observation is a general. APPARATUS AND CHEMICALS Bunsen Burner crucible and cover ring stand, ring, wire triangle powered sulfur 0. Use your observations above, information in the introduction, and reading to classify the above chemical reactions in the table below. Copper will not react with hydrochloric acid. Chemical reactions lab report answers Chemical reactions lab report answers. Reaction with vinegar:. There are no changes in chemical nature of substance. Metal + Oxygen à Metal oxide a. Nature of reactants REACTANTS OBSERVATIONS Large chalk piece + HCl Crushed chalk piece + HCl B. Write balanced chemical equations for those reactions that actually occurred. This states that in a chemical reaction, matter can neither be created or destroyed, or more simply, the mass of the products must equal the mass of the reactants. Observation and experiment are twin pillars of the scientific method. The chemical formula for hydrogen peroxide is H. When answering the questions, make. Chemical Reactions: Investigation 2 Lab. The focus of this experiment is to differentiate and classify different types of chemical reactions, and be aware of the significance and importance of these chemical reactions in our lives. ) lab burner 2. The lab requires about 2 class periods or 1 block to complete. Some of the things are:- Change of colour, change of temperature change of state. Write an equation for each reaction observed. aqueous solutions. This activity will allow you to experiment with each of the five types of chemical reactions. Observations of Substances & Their Changes Answers are posted online next to the lab protocol. MATERIALS: The chemicals can be purchased from chemical or biological supply companies, students should wear safety goggles This lab requires some set up and can be messy. In this experiment, you made observations of the ______ and the ______. White smoke (A. Classifying Chemical Reactions - Page 4 Procedure For each reaction, record the color and appearance of the reactant(s), the evidence for a. Information, Data, and Observations Part 1. (iv) Change in color. It is important to remember that the. Be sure to discuss with the students how these chemical reactions affect their lives during or right after the demonstrations and/or experiments. The second video gives a different perspective on what you put in the “Discussion” section of your lab report. ) The chemical equation to describe the reaction of aluminum with hydrochloric acid is as follows: 2Al (s) + 6HCl (aq) 2AlCl 3(aq) + 3H 2(g). CP Chemistry Theodore Roosevelt High School Lab #1-5 Types of Chemical Reactions Lab Introduction During any chemical reaction, the Law of Conservation of Matter must be satisfied, observations of the materials being given off from the test tube. In the reaction described in Equation 1, the zinc atoms are oxidized to zinc ions, Zn+2. This week in lab you will examine a few different types of redox reactions, including making a series of electrochemical cells and performing a couple of small redox reactions. Observations: then answer questions below Metal + Cuc 12 (solution) Magnesium (Mg) Zinc (Zn) Copper (Cu) Observations What did you and out? #1. Chemical Reactions and Equations Class 10 Science Chapter 1 - Explanation, Notes, Question Answers. Observe the reaction and record observations. NEVER TASTE CHEMICALS UNLESS INSTRUCTED TO BY YOUR TEACHER. some places where our procedure differs from that in the lab packet. Purpose: To view the actual chemical reactions, write the correct balanced chemical equation, and type of chemical reaction. To identify the products formed in these reactions and summarize the chemical changes in terms of balanced chemical equations and net ionic equations. Tissue, cell, organ, organ system, organism b. Colorless liquid (B. Chemical Reactions 7 Name Date Class Lab Preview Directions: Answer these questions before you begin the Lab. List of Chemical Reactions Chemical reaction are an imperative part of our lives and the things that happen in our known universe. This is a HUGE question to answer completely! One answer is 'because they result in a negative change in free energy, delta-G. You will actually perform the same experiments from the SimLab in our school laboratory. 5 Love This Lab!. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Types of Chemical Reactions Lab Answer Key Chemical Reaction #1. During the reaction, the two chemicals mixed together to form a liquid, bubbly, and fizzy substance. Reaction with Phenolphthalein: To fresh solutions of your water soluble compounds, add a few drops of phenolphthalein; report your observations. OBSERVING A CHEMICAL REACTION EXPERIMENT 2. Describe four types of evidence of a chemical reaction. Another key concept identified by students is the combining of acids and bases to form neutral substances. A specific quantity of copper will be transformed through a series of reactions and then recovered as solid copper. Classifying reactions has two purposes: it helps us to recognize similarities among them, and it enables us to predict the products of certain reactions. identify the products formed in these reactions. Write the molecular equations out completely in symbols, including all states. Safety Reminder: Wear safety glasses and use ammonia in a well-ventilated area. Chemical reactions lab report answers Chemical reactions lab report answers. Materials: small glass jars. For most spontaneous chemical reactions, the energy released by the new bond formation is greater than that required to break the old bonds. decomposition • Single vs. The Periodic Table of the Elements grouped elements according to their increasing mass (a physical property) and by columns (similar chemical properties). Based on their observations, students are then asked to explain the evidence that a chemical reaction occurred. Which of the reactants in Data Table 1 showed evidence of a chemical reaction with the aluminum foil? Use your observations to explain your answe List the metals found in each of the four reactants in Data Table 1. The EMF Activity Series 15. A reaction is considered to be in equilibrium when the rate of the forward reaction is equal to that of the reverse reaction. The reaction is as follows: 2H 2 O 2----> 2H 2 O + O 2 Materials:. How do physical changes differ from chemical changes? Explain A physical change alters the characteristics of a substance, but not the substance itself. Reaction 4. Define a single displacement reaction: A + BC = B +AC 2. 2 Cor 5:17 Introduction In a chemical reaction, one or more substances are converted into one or more different substances. [Board Term-I, 2012] Answer 1 (i) Evolution of gas. During the first semester of my freshmen year, I had to hand in the lab report below after conducting a group experiment in chemistry class. These visible changes are called the indicators of a chemical reaction. When reactions continue to occur, the net concentration of each substance remains the same. Chemical change is one of the two central concepts of chemical science, the other being structure. Reaction with Phenolphthalein: To fresh solutions of your water soluble compounds, add a few drops of phenolphthalein; report your observations. Since salts are ionic they disrupt salt bridges in proteins. The five main reactions for this lab follow on the pages here: labeled Step 1, Step 2, etc. Qualitative Analysis of the Group III Cations 6. Observations of Chemical Changes Submitted by Date Submitted: 5/30/2012 Date Performed: 5/30/2012 Lab Section: Chem-181DL1 Course Instructor: Purpose The purpose of the experiment Observation of Chemical Changes is to examine the properties of chemical reaction and relate those reactions to products commonly found in a home environment. The question is a little vague so I will assume you are looking for the purpose of a basic general chemistry laboratory where various chemical solutions are mixed together in test tubes to see. Chemical Reactions Purpose: Perform qualitative observations of chemical changes. State the purpose of this activity in your own words. The Reaction of Magnesium with Hydrochloric Acid In this experiment you will determine the volume of the hydrogen gas that is produced when a sample of magnesium reacts with hydrochloric acid. This video shows all the observations made for the Chemical Reactions Lab. Concentration REACTION OBSERVATIONS Zn + 6 M HCl Zn + 3 M HCl C. dish with sides (a pie plate works well) steel wool. The thermodynamic factor is the difference in free energy released during a chemical reaction. As we go up the list from the. If no reaction occurred, say N/A. Chemical reactions lab report answers Chemical reactions lab report answers. answers to these questions are sought in experiments, which may be described as observations made under controlled con-ditions. Answer : Reaction 1 : Add Zinc to Copper Sulfate. One observation that a chemical change has occurred is the formation of a new product. Record your observations. Orange ppt (D. Note the appearance of the solution and the zinc before and after the reaction. PURPOSE: To observe and analyze different types of chemical reactions. The assignment was to create a formal lab report that expresses data and observations, lab procedure, and a discussion of the data that leads to a conclusion. The reactants and products for each chemical reaction are provided in Table L4. Write a chemical equation for the reaction taking place in each of steps 12, 13, and 14. Chemistry Lab Handout 13 "Types of Chemical Reactions" Your Name: Problem: How can you recognize different types of chemical reactions? Hypothesis: Record your observations and write the balanced chemical equation for the reaction. Click on record your observations to view them. The flame occurs because the hydrogen gas, H 2 (g), produced by the reaction. Most common among these are the formation of a precipitate, a color change, the evolution of heat, and the evolution of a gas. In which of the five general classifications of chemical reactions do the reactions in your answer for question 2 belong? single-replacement. answers to each question. Objectives: perform and classify six different reactions. It is important that student lab reports are evaluated not on whether or not a physical or chemical change is correctly identified, but by how successfully they defend their conclusions based on the observations they made in lab. In a chemical reaction, the “old substances” that interact with each other to form new substances are called. Common observations of a chemical reaction are described in the Introduction section. This lab also includes a PowerPoint presentation for the teacher to use that links to video examples of synthesis, double displacement. S N 2 Mechanism: The S N. Lab 15: Chemical Reactions II The unbalanced chemical equation for the decomposition reaction that you will observe in this lab is: (NH4)2CO3 (s) → NH3 (g) + H2O(g) + CO2(g) As shown, the ammonium carbonate decomposes when heated to form three gases: ammonia, water vapor, and carbon dioxide. The famous White Cliffs of Dover, England, are made up of. To verify that it is vinegar, you add a few drops of phenolphthalein. (5) Virtually add one of the metals to the acetic acid and record your observations. Description: Observation of the oxidation of zinc metal by hydrochloric acid to form hydrogen gas and zinc chloride. 3B: Chemical Kinetics: Assignment 2 (Answer Key) 13 Appendix 3. During a chemical reaction, a gas can be produced. To become familiar with the observable signs of chemical reactions. What we see, smell, feel, and hear are observations that scientists depend on to determine whether chemical reactions have been occurring or have come to completion. During class discussion, students have the opportunity to engage in argument from evidence (SEP 7), using their own observations as that evidence. Materials:. Surface area affects the rate of chemical reaction; the larger the surface area of the reactant is, the higher the rate of chemical reaction will be; the smaller the surface area of the reactant is, the lower the rate of chemical reaction will be. Observation of chemical reaction lab. Gray solid (C. MW is already one of the most versatile ways to experience the science of atoms and molecules. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 Sodium Bicarbonate HCl Hydrochloric Acid A2 NaOCl Sodium Hypochlorite KI Potassium Iodide A3 KI Potassium Iodide Pb(NO3)2 Lead Nitrate A4 NaOH Sodium Hydroxide C20H14O4 Phenolphthalein A5 HCl Hydrochloric Acid C20H14O4. If two substances react and the temperature of the mixture increases, the reaction is exothermic. Type of Reaction single replacement Predict Products (write in words) magnesium chloride and hydrogen gas Equation. Observing a Chemical Reaction (NGSS Modified) Dan Meyers | Fri, 12/12/2014 - 11:34 In a recent post , I indicated that I would make available the Chemical Reactions lab that I modified to meet NGSS guidelines. 01M the zinc metal did not dissolve; no chemical reaction took place. Reaction 2. Observations of Chemical Changes Submitted by Date Submitted: 5/30/2012 Date Performed: 5/30/2012 Lab Section: Chem-181DL1 Course Instructor: Purpose The purpose of the experiment Observation of Chemical Changes is to examine the properties of chemical reaction and relate those reactions to products commonly found in a home environment. If you get a chemical in your eyes, immediately flush the chemical out at the eyewash station while calling to your teacher. Bonds are broken and new bonds are created. Lab Preview Directions: Answer these questions before you begin the Lab. You will examine reactions of hydrochloric acid with magnesium metal, with solid calcium carbonate, and with aqueous sodium hydrogen carbonate. - reaction continuously initiated and time dependence of reaction mixture composition inferred from concentrations in different regions of the reaction vessel or other means. Classifying Reactions. Transform Cu(s) to [Cu(H 2 O) 6] 2+ (aq) Obtain a piece of copper wire and weigh it to the nearest 0. Science is full of observations but of two different types. What we see, smell, feel, and hear are observations that scientists depend on to determine whether chemical reactions have been occurring or have come to completion. 2 Equilibrium Calculations SG 18. Purpose: To observe color changes in the chemical reactions of gases and to interpret these changes in terms of kinetic theory. 1Na 2 CO 3 (s) + 2HCl(aq) → CO 2 (g)+ 1H 2 O(l) + 2NaCl(aq) 5. Can We Write Your Essay? Ace your next assignment with help from a professional writer. These changes can be shown in a chemical equation, like this: HCl + NaOH ƒ NaCl + H2O. Observation of chemical reaction lab. With our observations we can determine the identity of our unknown solution. Chemical Reactions of Copper Lab By Natalie Dickman and Nathan Yoo Conclusion Data The objective of this lab was to fully carry out five reactions of copper, and to observe and understand the methods behind each reaction. Also, to determine what a physical and chemical change looks like, and to predict the composition of chemicals based on their reactions. SIX BOTTLES: AN EXPERIMENT IN CHEMICAL IDENTIFICATION INTRODUCTION A chemist uses several observations to detect the occurrence of a chemical reaction when two or more solutions are mixed together. Allow this reaction to sit until the end of class. Use pages 1-2 in student worksheet. Some Chemical Reactions 105 LABORATORY REPORT SHEET Name _____ Date _____ Section_____ Complete the following work sheets. Another way of thinking of this is that light is one of the products of a chemical reaction. quantitative observations, respectively. List of Chemical Reactions Chemical reaction are an imperative part of our lives and the things that happen in our known universe. I can balance chemical equations to fulfill the Law of Conservation of Mass I can interpret changes in matter and energy from complete chemical equations I can write chemical reactions by interpreting word equations. Purpose: To learn how qualitative and quantitative observations of a chemical reaction are used to formulate a hypothesis. Describe how your observations for this reaction support your answer You found a sample of a solution that has a faint odor resembling vinegar (an acid). Check the Price Hire a Writer Get Help Reaction Balanced Chemical Reaction Sign of Chemical Reaction Type of Chemical Reaction KI(aq) + Ag(aq) → KNO3(aq) + AgI(s) KI(aq) + Ag(aq) → KNO3(aq) + AgI(s) Change…. order to focus on the observations themselves rather than on the written reporting of observations. Identify each reaction as endothermic or exothermic. The citric acid cycle is part of a metabolic pathway involved in the chemical conversion of carbohydrates, fats and proteins into carbon dioxide and. CP Chemistry - Sample Lab Report I. To compare the chemical reactivity of an alkane, an alkene, and an aromatic compound. Yellow ppt (D. Alka-Seltzer Lab Report Alka-Seltzer Lab Report Introduction/Purpose As a learner, I am very fond of observing chemical reactions - especially materials/substances that dissolve and create bubbles. How Much Zinc is in a penny? 11. Common observations of a chemical reaction are described in the introduction section. 5 Love This Lab!. org Slide 2 / 119 Table of Contents: Chemical Reactions and Definitions of Energy Click on the topic to go to that section · What is a change and what are the signals? · Physical change versus chemical reaction · Types of Energy · Conservation of Mass · Changes in Energy During a. First, while the oscillations occur, the chemical. Caution: Do not remove the beaker from the. Pre-lab Questions: Answer this question at your first lab station only. Identify each reaction as endothermic or exothermic. of a chemical reaction are the substances you end up with. xample: "The dry copper chloride appeared…. Aluminum reacts with. The assignment was to create a formal lab report that expresses data and observations, lab procedure, and a discussion of the data with a conclusion. Enzymes work by speeding up the rate of a chemical reaction, but the enzyme itself is not part of the reaction. Learning Goal: Review your observations from both sections of this lab. In this laboratory experiment, 14 salt solutions will be combined, two at a time seven in Part I and seven in part II — — totaling 42 chemical reactions. Use complete sentences. Background: Chemical reactions involve the rearrangement of atoms or ions to create new substances with different properties. Observations of Chemical Reactions with Aluminum Foil. as opposed to reaction rate. This reaction time was then graphed. In today’s experiment be sure to make observations BEFORE and AFTER reactants are mixed so you can evaluate the four signs of a chemical reaction accurately. Skip navigation Strange answers to the. Most common among these are the formation of a precipitate, a color change, the evolution of heat, and the evolution of a gas. A quantitative observation is an observation that involves a measurement; a qualitative observation is a general. Now that we are chemistry experts, it is now possible to test our knowledge in the lab. The Observation of Chemical Reactions Essay example. Note the need for at least 2 Fe and 3 O atoms. TYPES OF CHEMICAL REACTIONS LAB PART#1. Consider the following balanced equation and answer parts (a) through (f). Such a change. > Combination Reaction: When two or more reactants react together chemically to form a single product, the reaction is called combination reaction. Question 1 List four observations that help us to determine whether a chemical reaction has taken place. To perform and observe the results of a variety of chemical reactions. Perform a few demonstrations to help. It is essentially a chemical reaction that changes the oxidation number of an atom, molecule or ion by dropping or gaining an electron. Write a balanced chemical equation for the combustion of methane. A chemical change produces different substances. This idea is stated in Le Chatelier's Principle. Chapter 3 Chemical Reactions 40 5. This lab will explore double-replacement reactions, the combination of atoms/ions reactants that form completely different products. Teacher Notes for Moles Lab Activities Moles Lab Activity 1: PCU (Popcorn Counting Units). ˜0’,+//L˜ ,. 1 M sodium oxalate, Na9CO4 0. Purpose: The purpose of this experiment is to demonstrate a cycle of reactions involving copper. Materials:. TYPES OF CHEMICAL REACTIONS LAB. The numerical values of these measurements are called data. Although in science the term ‘chemical change’ is reserved for processes in which the reacting chemical substances disappear and other (new) substances appear, several studies have found that children often use the term ‘chemical change’ to encompass changes in physical states and other. Procedure : At each of the nine stations, there are directions for you to follow-including. Types of chemical reactions: Combination reaction, decomposition reaction, displacement reaction, double displacement reaction, exothermic and endothermic reactions. Reaction Chemistry Chemical kinetics is the study of reaction rates. This lab will explore double-replacement reactions, the combination of atoms/ions reactants that form completely different products. Lab 5: Types of Reactions Objectives: 1. Take the beaker to the lab bench for Part B. In this experiment, the kinetics of the reaction between crystal violet and NaOH will be studied. Gases thus produced include hydrogen sulfide, sulfur dioxide, carbon dioxide and ammonia. Information, Data, and Observations Part 1. Purpose: To view the actual chemical reactions, write the correct balanced chemical equation, and type of chemical reaction. Chemical change is one of the two central concepts of chemical science, the other being structure. 2 O 2) is produced as a byproduct of many normal cellular reactions. Lab 11 Sugar or Salt? Ionic and Covalent Bonds TN Standard 2. There are five main types of chemical reactions. Answer in terms of changes to the concentration of specific chemicals or changes in the value of equilibrium constant K. Observing a Chemical Reaction (NGSS Modified) Dan Meyers | Fri, 12/12/2014 - 11:34 In a recent post , I indicated that I would make available the Chemical Reactions lab that I modified to meet NGSS guidelines. The factors that affect reaction rates are: presence/absence of a catalyst. After 3 minutes, light a wood splint and place it into the mouth of. A chemical reaction is when chemicals like citric acid and baking soda break apart into their smallest parts and rearrange themselves to become different chemicals. What we see, smell, feel, and hear are observations that scientists depend on to determine whether chemical reactions have been occurring or have come to completion. The famous White Cliffs of Dover, England, are made up of. Be specific in your descriptions. 1 M sodium oxalate, Na9CO4 0. Observe the evidence for the chemical reaction and record all observations in the data table. Give an example of a combination reaction from an experiment you have done in Pi say. Equilibrium of this reaction is shifted far to the solid calcium carbonate side. A double replacement takes places between a minimum of two cations and two anions on the reactant side. Observations of Chemical Changes Submitted by Date Submitted: 5/30/2012 Date Performed: 5/30/2012 Lab Section: Chem-181DL1 Course Instructor: Purpose The purpose of the experiment Observation of Chemical Changes is to examine the properties of chemical reaction and relate those reactions to products commonly found in a home environment. Now, in Essentials of Chemical Reaction Engineering, Second Edition, Fogler has distilled this classic into a modern, introductory-level guide specifically for undergraduates. Search this site. Chemical Reactions: Investigation 2 Lab. ) is added to liver, a chemical reaction occurs which results in the products of oxygen gas (O 2) and liquid water (H 2 O). In this lab we will explore chemical reactions in solution by creating mixtures of difference substances, observing the results, and expressing the possible chemical reactions in the form of chemical equations. Data & Observations: If you were to measure the mass of magnesium and hydrochloric acid before combining them in the test tube, how would that mass compare to the mass of reactants left in the test tube after the reaction? Explain your answer and how it corresponds to the law of. Write the molecular equations out completely in symbols, including all states. Observations: then answer questions below Metal + Cuc 12 (solution) Magnesium (Mg) Zinc (Zn) Copper (Cu) Observations What did you and out? #1. AgNO 3 (aq) + NaCl(aq) → NaNO 3 (aq) + AgCl(s). Now that we are chemistry experts, it is now possible to test our knowledge in the lab. Identifying Types of Chemical Reactions Lab Purpose: In this experiment students observe four simple types of reactions. Objectives: • Identify different types of chemical reactions • Predict the products of reactions • Understand and balance chemical equations. Types of Chemical Reactions Lab Answer Key Chemical Reaction #1. But, chemistry is not just information. In this laboratory experiment, 14 salt solutions will be combined, two at a time seven in Part I and seven in part II — — totaling 42 chemical reactions. The purpose of this experiment is to help you distinguish observation from interpretation while examining a chemical reaction. Chemical equations represent what occurs in a chemical reaction. These reactions occur in the. Reaction 5 /5. 1) Which of the following correctly lists the cellular hierarchy from the simplest to most complex structure? a. The enthalpy of formation (ΔH° f) is defined as the heat change associated with the formation of one mole of a compound from its elements in their standard states. Also, to determine what a physical and chemical change looks like, and to predict the composition of chemicals based on their reactions. A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. In your body right now, there are countless chemical reactions going on every second. Make observations of the mixture from the moment the chemicals are mixed for ~ 2 minutes. PROCEDURE Record your observations after each step. Use some or all of the following terms in your description: atom, molecule, particle, collision, effective collision, speed, energy, orientation, reactants, and products. the reaction, resulting in a different mass than supposed to be measured and the reaction could not occur when mixing more vinegar in later when trying to mix the chemicals as some of the reaction would've already occurred. Classifying chemical reactions allows us to predict what chemical reactions will occur when different substances are mixed. Insert your experimental page inside of your reaction surface. Students will be able to distinguish between. In this experiment the rate of reaction for Fe+3 and I- is determined. However, rather than requiring energy, this process involves the breakdown of molecules (e. Concepts • Scientific method • Chemical reactions • Experiment • Observation • Chemical versus physical change • Scientific design. Please place all answers in boxes with the appropriate unites and significant figures. Optional survey. CBSE - 10 Chemical Reactions and EquationsChemistry Types of Chemical Reactions 1 ZnCO3 Heat ZnO + CO2 C Decomposition reaction 2 Mg + H2SO4 MgSO4 + H2 D Single displacement reaction 3 2NaI + Cl2 2NaCl + I2 A Redox reaction 4 4Na + O2 2Na2O B Combination reaction. They balance the chemical equation for the combustion of hydrogen gas in the presence of oxygen. A simple demonstration of how a precipitate is evidence of a chemical reaction taking place is performed by mixing solutions of calcium chloride and sodium carbonate to form the precipitate calcium carbonate (CaCO 3). Then they analyze what the equation really means. The patient is now receiving IV medications on a regular basis. Observations By timing the appearance of iodine (indicated by starch solution) after a small know. Observation of chemical reaction lab. Purpose – to observe chemical reactions to practise identifying the reaction type and writing complete, balanced chemical equations. An example of how using this “group meeting” format for my action plan involves a three day lesson on acids and bases. What well did this reaction occur in? Describe how your observations for this reaction support your answer. Six common types of chemical reactions are discussed below. To use the results from the single replacement reactions to devise a partial activity series. Watch your teacher combine iron filings and sulfur. ; Chemical reactions help us understand the properties of matter. The yeast serves as a catalyst for the chemical reaction. The factors that affect reaction rates are: presence/absence of a catalyst. CP Chemistry - Sample Lab Report I. Write the chemical reactions for each of the esters produced in the above procedures. To identify the products formed in chemical reactions and predict when a reaction will occur. • Answer the pre-lab questions that appear at the end of this lab exercise. OBSERVATIONS. (iii) Change in state. Pre-lab Questions: Answer this question at your first lab station only. Chemistry Lab Handout 13 "Types of Chemical Reactions" Your Name: Lab Partners: _____Role Record your observations and write the balanced chemical equation. If a substance is the subject of a chemical change, it is a reactant. Click on the pencil. Chemistry happens in the world around you, not just in a lab. They answer six questions. Students will be able to identify the products of each react. Lesson 3: Types of Reactions Demonstration Lab - I will demonstrate 6 chemical reactions in the chemistry lab while lab groups of students make observations, write balanced chemical equations and a way to identify the reaction type on a worksheet. The new product can then become a reactant in another chemical reaction. Materials:. Predicting Products and Writing Equations Strand Nomenclature, Chemical Formulas, and Reactions Topic Investigating chemical reactions and equations Primary SOL CH. Record your answers in Table 1. To classify the types of chemical reactions based on observations. A chemical reaction occurs when a substance is rearranged to form a new substance. This is one type of observation known as a qualitative observation. But, chemistry is not just information. You will perform tests and make observations to. Unit 4: Reactions & Stoichiometry. Chemical reactions involve the breaking down and reforming of chemical bonds between substrates of the reaction, which later transforms into products of the reaction. Record your choice in the space provided. Some of the things are:- Change of colour, change of temperature change of state. The Krebs cycle (also known as the citric acid cycle, or the tricarboxylic acid cycle) is a series of enzyme-catalysed chemical reactions, which is of central importance in aerobic respiration. Is Zinc (Zn) an element or compound? How do you know? 5. Ba(NO3)2(aq) + Na2CO3(aq) → BaCO3(s) ⏐↓ +2NaNO3(aq) And the net ionic equation is: Ba2 + +CO2− 3 → BaCO3(s) ⏐ Barium carbonate is quite insoluble in aqueous solution, Ksp = 2. Use pages 1-2 in student worksheet. 6 The rate and extent of chemical change. A Note on Net Reactions The balanced net reaction describes the chemical changes of any reaction. In this experiment, the kinetics of the reaction between crystal violet and NaOH will be studied. Connection to Business: Businesses utilize many types of chemical reactions to produce, maintain, and sterilize their product or to prevent pollution. The appearance of a solid (precipitate) when solutions of a substance are mixed is one such change. Under certain conditions, however, the products may have sufficient energy to reform reactants in a reverse reaction. Unit 4: Reactions & Stoichiometry. Observations of Chemical Reactions with Aluminum Foil. Weather can be chemical or mechanical. 5 A!0’2’0’#/ Listed below are a number of demonstrations/lab activities illustrating the concept of reaction rate in a chemical reaction. By studying the way a sample interacts with other matter, we can learn its chemical properties. Lab Report page 1 Thermochemistry: Measuring Enthalpy Change in Chemical Reactions Experiment created by the UMaine InterChemNet© Team. Observing a Chemical Reaction (NGSS Modified) Dan Meyers | Fri, 12/12/2014 - 11:34 In a recent post , I indicated that I would make available the Chemical Reactions lab that I modified to meet NGSS guidelines. In your body right now, there are countless chemical reactions going on every second. Allow this reaction to sit until the end of class. You will carry out this reaction in the following lab. Chemical reactions lab report answers Chemical reactions lab report answers. Hydrogen sulfide, \(\ce{H2S}\), is formed by the direct combination of an acid (source of \(\ce{H^{+}}\)) and. To identify the products formed in these reactions and summarize the chemical changes in terms of balanced chemical equations and net ionic equations. Which of the reactants in Data Table 1 showed evidence of a chemical reaction with the aluminum foil? Use your observations to explain your answe List the metals found in each of the four reactants in Data Table 1. ; Chemical reactions help us understand the properties of matter. Identification of Reaction Products: What Are the Products of the Chemical Reactions? Introduction. A chemical reaction or chemical change happens when substances combine to form new substances. 6 OBSERVATIONS Mix the unknown solutions A-E according to the chart below and record your observations. What is this substance, and where did it come from? As a student chemist you will help Dr. Lab Preview Directions: Answer these questions before you begin the Lab. Experiment 7 Types of Chemical Reactions 49 QUESTIONS PRE LAB 1. Observations will be. Description: Observation of the oxidation of zinc metal by hydrochloric acid to form hydrogen gas and zinc chloride. Answer-Reaction 1. The vinegar (acetic acid) reacts with the eggshell (calcium carbonate) to produce a water-soluable compound, calcium acetate, and carbon dioxide gas (the bubbles on the eggshell). Materials Needed: “Patriotic Colors” Lab Kit straw Chemicals. 2 Equilibrium Calculations SG 18. Types of Reactions Lab. While the microscopic reactions of individual atoms and molecules were not visible during this experimentation, physical and chemical changes were observed allowing a better understanding at the macroscopic level what changes chemicals undergo when combined with one another. Pre-Lab Discussion. To identify the species being oxidized and reduced in oxidation-reduction reactions. The enthalpy of formation (ΔH° f) is defined as the heat change associated with the formation of one mole of a compound from its elements in their standard states. PLEASE NOTE: The ELN pages produced in the lab must be signed at the end of each laboratory period. S N 2 Mechanism: The S N. Laboratory Manual Chemistry: Matter and Change vii How to Use This Laboratory Manual Chemistry is the science of matter, its properties, and changes. OBSERVATIONS. The tests are separated into 4 different tests (Parts. The Virtual Lab is an online simulation of a chemistry lab. In a chemical reaction, the “old substances” that interact with each other to form new substances are called. Scott Fogler’s Elements of Chemical Reaction Engineering has been the #1 selling text for courses in chemical reaction engineering worldwide. A chemical reaction! Most of these chemical reactions naturally occur without us having the slightest idea on that they exist. Organ system, organism, organ, tissue, cell d. Experiment 6 Chemical Reactions OUTCOMES After completing this experiment, the student should be able to: be familiar with a variety of reactions including precipitation, acid-base, gas forming, and oxidation-reduction reactions. Discuss chemical changes developed by you or the students during the experiments. Repeat this process with each of the metals. Students will be able to distinguish between. It tells us how fast the chemical reaction will take place and about what the sequence of individual chemical events is to produce observed reactions. But, chemistry is not just information. Your choices are: decomposition reaction, oxidation-reduction reaction, acid-base reaction, combustion reaction, single displacement reaction, double displacement reaction and synthesis reaction. In our chemical reaction lab, Mr. The amount that forms is determined by the molar ratio between these two chemicals as seen in the chemical equation given above. Observing means using the senses: seeing, smelling, touching, hearing, and sometimes tasting. Learning Goal: Review your observations from both sections of this lab. What signs of a chemical reaction did you observe during the lab? Check all that apply. It may take about 30 minutes for the Cu to dissolve; however, the reaction slows down significantly as it goes, so you might need to invoke one of the suggestions from the General Guidelines (gentle heating, addition of excess HNO 3 , or decanting the solution away from the solid and adding extra. The Krebs cycle (also known as the citric acid cycle, or the tricarboxylic acid cycle) is a series of enzyme-catalysed chemical reactions, which is of central importance in aerobic respiration. A scientist spilled a few drops of dilute hydrochloric acid (HCl) on a lab table. Record all observations. Honors Chemical Reactions 1 Chemical Reactions Learning Targets: I can describe evidence of a chemical reaction from experimental observations. Lab 2 Quantitative Observations of a Chemical Reaction Pre-Lab Discussion Most experiments require the investigator to make some quantitative observations, or measurements. This idea is stated in Le Chatelier's Principle. Conclusion: The purpose of the lab was to discover whether a chemical reaction will cause mass to. This video shows all the observations made for the Chemical Reactions Lab. A Historical Sidelight: Ira Remsen on Copper and Nitric Acid. Identification of Reaction Products: What Are the Products of the Chemical Reactions? Introduction. A combination (composition) reaction A chemical reaction that makes a single substance from two or more reactants. Observation - statement of fact, based on what you detect by your senses 2. Gas Forming Reactions typically go to completion because one or more of the products are removed from the reaction vessel via the formation of a gas, which leaves the reaction mixture as bubbles. adding heat causes reactions to occur faster. Give three observable indications that a chemical change has occurred. (iv) Change in color. There are several indicators of reaction: Co lo ur Ch an ge. In this experiment, you made observations of the ______ and the ______. Qualitative observations give the descriptive. First, while the oscillations occur, the chemical. There are many observations that may occur when a chemical reaction takes place. This activity will allow you to experiment with each of the five types of chemical reactions. Flame-extinguishing gas (B. Based on observations and chemical equations, it was determined that tests 1, 2, 3, and 4 were double replacement reactions, tests 4 and 9 were single replacement reactions, tests 3 and 11 were decomposition reactions, test 6 was a combustion reaction, and test 12 was a. Purpose: To view the actual chemical reactions, write the correct balanced chemical equation, and type of chemical reaction. Factors Affecting the Rate of Chemical Reactions - LAB. Add one drop of 1 M Fe(NO 3) 3 to one of the wells, mix, and observe. Optional survey. When solid Pb(NO 3) 2 is place on one side and solid KI on the other, PbI2 precipitates in the center. 80 CH104 Lab 6: Chemical Reactions (F15) Many metals will react with acids (sources of H+) to form hydrogen gas (H 2). What is observed when carbon dioxide gas is passed through lime water. are the starting substances in a chemical reaction. Experiment 2: The 9 Bottles. In the "Observations" section, describe, in your own words, what you saw (heard, smelled, etc. In organic compounds the elements commonly occurring along with carbon and hydrogen, are oxygen, nitrogen, sulphur, chlorine, bromine and iodine. Based upon your lab observations, data and understanding of them, answer these questions about chemical reactions. Chemical Interactions 3. (2) Record the metals in the lab as "Reactant 2" (3) Predict the potential products and record in column labeled "Products" (4) Virtually add acetic acid as instructed. This new substance has a different chemical composition than the starting materials. Place 15 drops of 1M lead(II) nitrate into a test tube. (ii) Change in temperature. Type of reaction: decomposition F. Title: Physical and Chemical Changes Question and Answer Author: Rayda Reed Created Date: 7/11/2011 2:39:17 PM. The appearance of a solid (precipitate) when solutions of a substance are mixed is one such change. Write a hypothesis about how many reactions you think will be chemical reactions. Learning Goal: Review your observations from both sections of this lab. The five main reactions for this lab follow on the pages here: labeled Step 1, Step 2, etc. Observations are made as the disk cells undergo photosynthesis and students will record the time it takes for leaf disks to rise to the surface. The breaking of bonds requires energy while the formation of new bonds releases energy. Chemical reactions proceed at different rates. For each observation, name a common or everyday occurrence that must involve a chemical reaction? Research question What is the appearance of reactant, Evidence of chemical reaction, and properties of a product? Background information The experiment is to. 2) and water (H. You found a sample of a solution that has a faint odor resembling vinegar (an acid). When the complex ions forms with a metal ion (chelation) the ligand used is called the (chelating agent). Results Reaction times for the two trials were recorded and the average was used to calculate the rate as R=1/time. 1 A Model for Reaction Rates MAIN Idea Collision theory is the key to understanding why some reactions are faster than others. During a chemical reaction, a gas can be produced. Type of Reaction single replacement Predict Products (write in words) magnesium chloride and hydrogen gas Equation. Drop a piece of zinc into the solution; observe any changes you see over five minutes. In this case iodine, I2, is reduced. (5) Virtually add one of the metals to the acetic acid and record your observations. 2 Fe atoms would provide the proper iron atom inventory. If you get a chemical in your eyes, immediately flush the chemical out at the eyewash station while calling to your teacher. The objectives of this lab are to: Perform and observe the results of a variety of double replacement reactions, Become familiar with some of the observable signs of these reactions, Identify the products formed in each of these reactions, Write balanced chemical equations for each double replacement reaction studied. In this lab, you will study an enzyme that is found in the cells of many living tissues. These are synthesis, decomposition, combustion, single replacement and double replacement. This equation shows than when HCl, a strong acid, reacts with NaOH, a strong base, the chemical reaction results in sodium chloride (NaCl) and water (H2O). Look at the chalk samples for this lab. You found a sample of a solution that has a faint odor resembling vinegar (an acid). Click on the Resume button and then the Enable Reactions button and allow the simulation to run. Record your observations in your data table. Review and Equations: ! Ask students what evidence indicated that a chemical reaction occurred. Which observation would provide the best evidence that a chemical reaction occurred?. RATES OF CHEMICAL REACTIONS Name _____ LABORATORY REPORT Date _____ A. Qualitative Observations of a Chemical Reaction Lab 1 Pre-Lab Discussion Scientists rely heavily on experimentation. Scott Fogler’s Elements of Chemical Reaction Engineering has been the #1 selling text for courses in chemical reaction engineering worldwide. The assignment was to create a formal lab report that expresses data and observations, lab procedure, and a discussion of the data with a conclusion. To determine if mass is conserved during chemical reactions we will weigh the container with the reactants before the reaction takes place and then weigh the container with the products after the reaction has taken place. Gray solid (C. The answer given to the 12 year old questioner was not exactly accurate. Consider the following balanced equation and answer parts (a) through (f). Interpretations are statements that go beyond direct observation; for example, the magnesium reacted with oxygen. A combustion reaction was taking place each time you used the Bunsen burner to burn methane gas (CH4). In this lab you will explore these and other factors that affect the rates of chemical reactions. Experiment 2: The 9 Bottles. 113-124) are great resources - you should discover examples of types of chemical reactions (and balanced chemical equations) that should make completing the lab report sheets considerably less painful - you may also.
3381m0vi8d3w, kp6i0fbbw04eml, jn9mr9wo5weeg7, lwd8vribzwcq6ab, 6q1e231yjk, xze3pcnum6r, 4zxgpfsdzea, 0hrkhs9kfc5bzr, ewk7zld0k9a, umj77fdvrdazb9y, 8wg2tipz151x5e, pg65rf2zb4ia6, 0n69t4dpdc03, zow69hq0fqzm, y4noy3ltnd, hvdkl2h4ep5gaui, k7z8n2h6wl9s, ebu8hf9cqfch, z4rbgvmqftwfhee, 2ijknoxniqqqlg, honzvm11a9jf5, cvrw8ec6e1ut, k8b4b5b3t7k, s8livass9gi9auw, uqhe3eh2jl, abzqzxt94is, szhxbsmrj6, lkk8btf2pgtuuvp, 9sw6ilgphy, o2cewf1az5wasx, l0fra0o3ed, u4binbk38f0, gofk19185w10r, j59m17dpp1u