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quiz3Su08AK

# quiz3Su08AK - Thermodynamics Electrochemistry Kinetics and...

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Thermodynamics, Electrochemistry, Kinetics and Organic Structures Chem 14B UCLA Summer 2008 Quiz # 3A Student ____________KEY_________ Before handing in your quiz, read and sign the following: On my honor, I have neither given nor received any aid in this quiz. Signature ____________________________________ Discussion session circle one 142043130 DIS1A Rachael Harper 142043230 DIS1B Rachael Harper 142043330 DIS1C Selma Duhovic 142043430 DIS1D Selma Duhovic Page 2 3 TOTAL max Obt 30 20 50 Each question is worth 10 points. Write in ink and show work if you want the opportunity to have your quiz regarded. DO NOT TURN THIS PAGE UNTIL YOU ARE ADVISED TO DO SO

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2 1. The rate of formation of Cr 2 O 7 2- is 0.14 mol/L s in the reaction 2 CrO 4 2- (aq) + 2 H + (aq) Cr 2 O 7 2- (aq) + H 2 O (l) a) What is the rate of reaction of CrO 4 2- ? (.14 mol/Ls)(2mol CrO 4 2- /1 molCr 2 O 7 2- ) = 0.28 mol/Ls b) What is the unique rate of reaction? (0.14 mol/Ls)/(1) = 0.14 mol/Ls) 2. For the reaction 2 ICl (g) + H 2(g) I 2(g) + 2 HCl (g) (ICl) 0 (H 2 ) 0 Initial rate mol/s 1.5 1.5 3.7 x 10 -7 3.0 1.5 7.4 X 10 -7 3.0 4.5 2.2 X 10 -6 What is the rate law for the reaction?
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