Peanut Butter and Jelly Lab Name I

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Peanut Butter and Jelly Lab

Name I. Title: Peanut Butter and Jelly Lab * Label everything with roman numerals. * Use the given title for your lab II. Purpose: To make a peanut butter and jelly sandwich. * Restate and expand on the purpose given on the lab handout.

III. Background: Before beginning this lab, be sure to check for allergies. Lab participants with allergies to peanuts or wheat should be cautious during the process of the lab. Peanut butter, jelly, and bread can be reacted together to create a nutritious lunch. The solutions of peanut butter, P, jelly, J, and bread, B, are mixed to create a peanut butter and jelly sandwich, PB 2 J. All three reactants are used in their natural states. The reaction is shown below in Equation 1. P(s) + J(l) + 2 B(s) PB 2 J(s) (Eqn. 1) In the course of the experiment one will place P and J on the two separate B. Then put the 2 B together so that the P and J are both concealed within the B. * Write in paragraphs * Summarize procedure * Define words * Include equation * Third person

Using stoichiometry, the quantitative relationship among the amounts of reactants and products, one can determine how much P, J, and B are needed to create the desired amount of PB 2 J (Neidig 2). The desired amount of product is 1. 00 PBJ. The reaction can only proceed as long as there is sufficient P, J, and B present to react. For example, if 12 J react with 30 B and 5 P, one would only be able to create 5 PB 2 J. In this example, P is the limiting reactant. This is the substance that is completely used up within the reaction. Thus, the stoichiometry of the reaction and the amount of limiting reactant available determine theoretical amount of product that can be formed. After an experiment, the actual yield of a reaction is seldom equal to theoretical yield. This can occur for a number of reasons but is quantitatively measured as the percent yield. This value is calculated using Equation 2. percent yield =(actual yield/theoretical yield)x 100 (Eqn. 2) This lab requires prior knowledge of balancing a chemical reaction, predicting products and understanding how they react, as well as the ability to work common kitchen utensils, such as a knife. As a safety precaution, wash your hands thoroughly with soap before beginning the lab. This decreases the chance of ingesting unanticipated materials from the environment. * Write in paragraphs * Summarize procedure * Define words * Include equation * Third person

IV. Materials/Illustrations: • 1 Jar of Jelly • 1 Jar of Peanut Butter • Knife • Bread • Spoon • Plate • Napkin * Include numbers * Use correct vocabulary

* Label illustrations * Use only clear and relevant illustrations

V. Variables: Affecting Variables How to Control Type of Peanut Butter; Type of Jelly; Type of Bread Buy the type of reactants which you prefer. Amount of Jelly and Peanut Butter Add desired amount of jelly and peanut butter to bread.

VI. Procedure: Let’s see what you have. * Be detailed * Include numbers * How, how

VII. Observations and Data: * Data collected, * Not data given * Not data calculated

VIII. Calculations/Data Analysis: Determine amount of each reactant needed to create 1. 00 PB 2 J. Peanut Butter 1. 00 PB 2 J 1 P =1. 00 P 1 PB 2 J Jelly 1. 00 PB 2 J 1 J =1. 00 J 1 PB 2 J Bread 1. 00 PB 2 J 2 B =2. 00 B 1 PB 2 J Determine Percent Error percent yield = (actual yield/theoretical yield) x 100 percent yield = (actual yield/1. 00 PB 2 J) x 100 percent yield = Narrate calculations

IX. Conclusions/Error Discussion: * Explain how errors effect results 1. Purpose… 2. Describe procedure… 3. Results… 4. Factors that effect… 5. Results could be improved if… 6. Take experiment further by… * Summarize

Work Cited Neidig, Anthony. CHEM 111. 1 Laboratory Manual. Pacific Grove, CA: Brooks/Cole, 2001.

Previous Lab Write-Up Concerns - 3 rd person -Should not include Ms. Bjorge or “instructor” - Remember your writing skills - Cite everything you look up

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