Chem 142 Lap Postlab Report #3

Chem 142 Lap Postlab Report #3 - NAME and ID Number: Quiz...

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NAME and ID Number: LAB PARTNER: Quiz Section: Grading: 35 pts for this template DATA, CALCULATIONS AND GRAPHS Part I: Reaction of hydrogen peroxide and bleach Concentration of stock solutions Bleach, NaOCl(aq) 6% %m/m NaOCl Hydrogen Peroxide, H2O2(aq) 3% Mass of 0.500 mL Bleach, g Density of Bleach, g/ml 0.54 1.08 1.09 1.09 1.63 1.09 2.71 1.09 Average Density, g/mL 1.09 2 pts Run Number mL of Bleach Run 1 4.0 mL 1.08 25 1 pt Run 2 4.0 mL 1.55 35 Run 3 4.0 mL 2.17 45 Run 4 4.0 mL 2.53 45 Run 5 4.0 mL 3.12 43 Run 6 4.0 mL 3.66 42 Run 7 4.0 mL Run 8 4.0 mL Run 9 4.0 mL Run 10 4.0 mL Run 11 4.0 mL % m/m H 2 O 2 Peroxide Generated EXPERIMENT 3: STOICHIOMETRY I. REACTION OF HYDROGEN PEROXIDE AND BLEACH II. REACTION OF IRON (II) WITH 1,10 PHENANTHROLINE Purpose and Method Things to think about: What is the goal of this experiment? Explain how it is accomplished. What is the general method (not step by step detailed procedure) that you will be using to achieve this goal? How will you process the data that you record in lab? (What calculations will you use and how do you obtain all of the values to plug into those equations?) Part I (3 pts) The goal of this experiment is to determine the stoichiometry between the reactants of a chemical reaction by holding the number of moles of Bleach (NaOCl) constant, and varying the moles of hydrogen peroxide (H202). Through this, we'll determine the stiochiometry of the reactants by measuring the amount of Oxygen gas produced after the reaction occurs. We do this by graphing our data that we have with the mass of the H2O2 (in grams) being measured on the x-axis and the Volume of O2 (gas) in mL being measured on the y-axis. Once we graph our data points, we are able to point out the equivalance point (the point at which neither reactants are in excess), we can figure out the moles by multiplying the weight of
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Chem 142 Lap Postlab Report #3 - NAME and ID Number: Quiz...

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