final07 - Name_ Student ID Number_ LAB Sec. # _; TA: _; Lab...

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Name__________________________________________________ Student ID Number_______________________________________ LAB Sec. # _____; TA: ____________; Lab day/time: __________ Dr. Matthew P. Augustine Winter 2007 CHEMISTRY 2B (Sec. C) Final Exam Instructions: CLOSED BOOK EXAM ! No books, notes, or additional scrap paper are permitted. All information required is contained on the exam. Place all work in the space provided. If you require additional space, use the back of the exam. A scientific calculator may be used. (1) Read each question carefully. (2) For Parts I and II , there is no partial credit given and only answers marked on this cover page will be graded . (3) The last page contains a periodic table and some useful information. You may remove it for easy access. (4) If you finish early, RECHECK YOUR ANSWERS! (5) Circle your choice on the right for the multiple choice questions 1 – 20. U.C. Davis is an Honor Institution Possible Points Points #1–12. (3 points each) / 36 #13–20. (6 points each) / 48 #21. (46 points) / 46 #22. (25 points) / 25 Total Score (155) /1.55 = % Multiple Choice (circle one) 1. A B C D E 2. A B C D E 3. A B C D E 4. A B C D E 5. A B C D E 6. A B C D E 7. A B C D E 8. A B C D E 9. A B C D E 10. A B C D E 11. A B C D E 12. A B C D E 1-12 total pts: 13. A B C D E 14. A B C D E 15. A B C D E 16. A B C D E 17. A B C D E 18. A B C D E 19. A B C D E 20. A B C D E 13-20 total pts:
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Final Exam Page 2 of 16 Initial:___________ Part I: Multiple Choice, Concepts Circle the correct answer and circle your response on the cover – No partial credit 1. (3 pts) Choose the INCORRECT statement. A. A reaction with Δ H < 0 and Δ S > 0 is spontaneous. B. Equilibrium is never established in a reversible chemical reaction. C. If Q < K then Δ G < 0. D. Changes in temperature will change the value of an equilibrium constant. E. Chemical equilibrium is a dynamic equilibrium. 2. (3 pts) The pH of an ammonium acetate NH 4 C 2 H 3 O 2 solution is approximately 7. The best explanation for this observation is that A. the salt does not react with water. B. ammonium acetate is a weak electrolyte. C. all salts of weak acids and weak bases are neutral. D. aqueous ammonia and acetic acid have approximately equal ionization constants. E. the salt is a product of a strong acid and a strong base. 3. (3 pts) A 100 mL sample of a 0.10 M NH 3 and 0.10 M NH 4 Cl buffer solution is prepared. If 100 mL of water is added to this solution, what happens to the pH? A. The pH does not change. B. The pH increases slightly. C. The pH decreases slightly. D. The pH becomes basic. E. The pH becomes acidic.
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Final Exam Page 3 of 16 Initial:___________ 4. (3 pts) Choose the correct statements concerning entropy.
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final07 - Name_ Student ID Number_ LAB Sec. # _; TA: _; Lab...

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