Exam 4 - Chem 121-02 Exam 4 December 2, 2005 Name: Page 1...

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Chem 121-02 Exam 4 Name: December 2, 2005 Page 1 (12 points) Page 2 (24 points) Page 3 (21 points) Page 4 (19 points) Page 5 (24 points) Total (100 points)
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Multiple Choice: Neatly write your answer in the space provided. (2 points each) 1. An solution has a pK b = 12.6. Which statement correctly describes this solution: a) This is a strong acid b) This is a relatively “strong” weak acid c) This is a relatively “strong” weak base d) This is a strong base 2. Which of the molecules below is the strongest acid: a) H 3 AsO 4 b) H 2 AsO 4 - c) HAsO 4 2- d) AsO 4 3- 3. If K c = 1.6 x 10 9 for the reaction 2CO (g) + O 2 (g) 2CO 2 (g), then the reaction would a) take place very rapidly b) go only in one direction c) not take place to any degree d) go essentially to completion 4. In order to produce the most possible Ni(CO) 4 (g) from the following equilibrium one could: Ni(s) + 4CO (g) Ni(CO) 4 (g) + heat a) increase temperature b) remove Ni(CO) 4 c) add Ni d) decrease pressure 5. At 100 C, K = 0.092 for the following reactions:
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Exam 4 - Chem 121-02 Exam 4 December 2, 2005 Name: Page 1...

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