Chem 1212k Practice Exam 3

Chem 1212k Practice Exam 3 - CHEM1212K PracticeExamThree...

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CHEM 1212K Practice Exam Three Spring 2011 1. Determine the rate law expression for the reaction CO(g) + Cl 2 (g) COCl 2 (g) given the following experimental data. Experiment Initial [CO] (M) Initial [Cl 2 ] (M) Initial Rate (M/s) 1 0.12 0.20 0.121 2 0.24 0.20 0.241 3 0.24 0.40 0.964 A) Rate = k[CO][Cl 2 ] 2 B) Rate = k[CO][Cl 2 ] C) Rate = k[CO] 2 [Cl 2 ] 4 D) Rate = k[CO] E) Rate = k[Cl 2 ] 2. The rate constant for a given second-order reaction is 10.5 M -1 s -1 . If the initial concentration of reactant is 0.100 M, then how long does it take for three half-lives to elapse? A) 3.8 seconds B) 2.9 seconds C) 1.1 seconds D) 0.95 seconds E) 0.20 seconds 3. The reaction A B + C is first order in A with k = 0.034 s -1 at 25° C. If [A] 0 = 2.4 M , then what is [A] after 4.2 s? A) 1.0 M B) 1.2 M C) 3.65 M D) 2.26 M E) 2.08 M
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CHEM 1212K Practice Exam Three Spring 2011 4. The following two half-reactions take place in a galvanic cell. At standard conditions, what species are produced at each electrode? Sn 2+ + 2e Sn E ° = –0.14 V Cu 2+ + 2e Cu E ° = 0.34 V A) Sn is produced at the anode, and Cu 2+ is produced at the cathode. B) Sn is produced at the anode, and Cu is produced at the cathode. C) Cu 2+ is produced at the anode, and Sn is produced at the cathode. D) Sn 2+ is produced at the anode, and Cu is produced at the cathode. E) Cu is produced at the anode, and Sn 2+ is produced at the cathode.
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Chem 1212k Practice Exam 3 - CHEM1212K PracticeExamThree...

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