2010-Spring-Parr-Practice-Final

2010-Spring-Parr-Practice-Final - Chemistry 105 B Final...

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1 Chemistry 105 B PLEASE PRINT YOUR NAME IN BLOCK LETTERS Final Exam Name: __________________________________________ 12/09/09 Last 4 Digits of USC ID:_____ _____ _____ _____ Dr. Jessica Parr Lab TA’s Name: _________________________________ Lab: W 1 / W 4 / Th 9 / Th 1 / Th 4 Please circle lab section above . Question Maximum points Score Grader Question Maximum points Score Grader 1 12 11 8 2 8 12 8 3 9 13 10 4 6 14 8 5 10 15 12 6 10 16 14 7 10 17 15 8 8 18 9 9 15 19 8 10 12 20 8 (Sub-T) (100) (Sub-T) (100) TOTAL 200 Please Sign Below: I certify that I have observed all the rules of Academic Integrity while taking this examination. Signature: __________________________________________________________________ Instructions: 1. You must show work to receive credit. 2. If necessary, please continue your solutions on the back of the preceding page (facing you). 3. YOU MUST use black or blue ink. (No pencil, no whiteout.) 4. There are 20 problems on 15 pages. Please count them before you begin. A periodic table is on the last page. 5. Good luck!! =) Final exam viewing on Sign up for 15-minute viewing appointment on class website. First Letter of last Name
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2 1. (12 pt) The reaction: 2 NO (g) + Cl 2 (g) 2 NOCl (g) was studied at -10 o C. The following results were obtained where: Rate = -( Δ [Cl 2 ]/ Δ t) [NO] o (mol/L) [Cl 2 ] o (mol/L) Initial Rate (mol/L*min) 0.10 0.10 0.18 0.10 0.20 0.36 0.20 0.20 1.44 a. What is the rate law for this reaction? b. What is the value of the rate constant for this reaction? c. If the initial concentration of NO is 0.35 M and the initial concentration of Cl 2 is 0.56 M, what is the initial rate of the reaction? 2. (8 pt) A proposed mechanism for a reaction is C 4 H 9 Br C 4 H 9 + + Br - slow C 4 H 9 + + H 2 O C 4 H 9 OH 2 + f a s t C 4 H 9 OH 2 + + H 2 O C 4 H 9 OH + H 3 O + fast a. Write the rate law expected for this mechanism. b. What is the overall balanced equation for the reaction? c. What are the intermediates in the proposed mechanism?
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3 3. (9 pt) For the reaction: H 2 (g) + Br 2 (g) 2 HBr (g) , K p = 3.5 x 10 4 at 1495 K. What is the value of K p for the following reactions at 1495 K? a. HBr
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2010-Spring-Parr-Practice-Final - Chemistry 105 B Final...

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