KEY FINAL SPRING 2008

KEY FINAL SPRING 2008 - Name_ Student ID Number_ LAB Sec. #...

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Name__________________________________________________ Student ID Number_______________________________________ LAB Sec. # _____; TA: ____________; Lab day/time: __________ Dr. Toupadakis Spring 2008 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 (27 problems, 13 pages). (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 two pages contain a periodic table and some useful information. You may remove these pages for easy access. (4) If you finish early, RECHECK YOUR ANSWERS! (5) Circle your choice on the right for questions 1–20. U.C. Davis is an Honor Institution Possible Points Earned Points #1–12 (3 points each) / 36 #13–20 (6 points each) / 48 #21 (9 points) / 09 #22 (9 points) / 09 #23 (9 points) / 09 #24 (9 points) / 09 #25 (9 points) / 09 #26 (9 points) / 09 #27 (9 points) / 09 Total Score (156) /147 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 Spring 2008 Page 2 of 13 Initial: ___________ Part I: Multiple Choice, Concepts. (3 points each) Circle the best answer. Circle your response on the cover page . No partial credit. 1. (3 pts) Each of the following is a thermodynamically stable form of an element at room temperature and 1 atm, EXCEPT : (A) O 2 (g) (B) F 2 (g) (C) C (diamond) (D) N 2 (g) (E) all of these are stable. 2. (3 pts) Which of the following exhibits significant hydrogen bonding? (A) HBr (B) H 2 CF 2 (C) H 2 (D) H 2 O 2 (E) CH 3 CN 3. (3 pts) Ethyl alcohol, C 2 H 5 OH, and water become noticeably warmer when mixed. This is due to: (A) Weaker attractive forces in the mixture than in the pure liquids. (B) The increase in volume when they are mixed. (C) The fact that ethanol has lower vapor pressure than water. (D) Stronger attractive forces in the mixture than in the pure liquids. (E) The fact that water and ethanol do not mix. 4. (3 pts) For the following reaction: heat + 2 NO 2 (g) N 2 O 4 (g) which change will not be effective in increasing the amount of N 2 O 4 (g)? (A) Decreeing the volume of the reaction vessel. (B) Increasing the temperature. (C) Adding N 2 to increase the pressure. (D) Adsorbing the N 2 O 4 (g) with a solid adsorbant. (E) Adding more NO 2 (g) to the reaction vessel.
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Final Exam Spring 2008 Page 3 of 13 Initial: ___________ 5. (3 pts) The equation giving the pH of a buffer is: pH = pK a + log ( [base]/[acid] ) The equation giving the pOH of a buffer will be: (A) pOH = pK a - log ( [base]/[acid] ) (B) pOH = pK b + log ( [base]/[acid] ) (C) pOH = pK b - log ( [base]/[acid] ) ( D ) p O H = p K b - log ( [acid]/[base] ) (E) None of the above.
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KEY FINAL SPRING 2008 - Name_ Student ID Number_ LAB Sec. #...

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