QUIZ 2Key

QUIZ 2Key - CHEMISTRY 113 Fall 2003 LAB QUIZ #2 25 Points...

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25 Points NAME____ANSWER KEY___________________LAB SECTION#___________________ 1. (3 pts) In the reaction rate = k[CV] m [OH] n define k and m k is a constant and m is the order of the reaction for crystal violet 2. (6 pts) A student started with 0.801 g of KHP (F.W. = 204.2 g/mole) and it took 33.88 mL of NaOH to reach the endpoint. The student then titrated 0.489 g of aspirin and it took 25.01 mL of NaOH to reach the endpoint. Calculate the formula weight of the aspirin sample. (+2 pts) 0.801 g 1 mole 1 mole NaOH = 0.116 204.2 g 1 mole KHP .03388 L (+3 pts) 0.489 g 1 mole NaOH = 169 g/mole 0.116 M .02501 L 1 mole ASP ( __________________ 3. (7 pts) A battery has a current of 7.99 x 10 -3 amps and will power a radio until 84% of the MnO 2 has been converted to Mn 2 O 3 . If the battery ran for 61.3 hours, how many grams ofMnO 2 (F.W. = 86.9 g/mole) did the battery contain? If you do not know how many colulombs are in a mole of electrons you can ask the T.A. but you will lose one point.
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This note was uploaded on 04/12/2008 for the course CHEM 109 taught by Professor Malina during the Spring '08 term at UNL.

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QUIZ 2Key - CHEMISTRY 113 Fall 2003 LAB QUIZ #2 25 Points...

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