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Unformatted text preview: Name__________________________________________________ Student ID Number_______________________________________ LAB Sec. # _____; TA: ____________; Lab day/time: __________ Dr. Andreas Toupadakis Winter 2005 CHEMISTRY 2B (Sec. D) 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 #112. (3 points each) / 36 #1320. (6 points each) / 48 #21. (44 points) / 44 #22. (15 points) / 15 Total Score (143) / 1.43 = % 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: 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) In a titration of a dilute weak acid with a strong base, which of the following statements is true ? a. The pH of the untitrated acid is equal to the pK a . b. The pK a of the acid is the pH at the half titration point or midpoint. c. The pH of the solution will initially be greater than the pK a . d. The pK a of the acid will vary with the volume of the base added. e. The pH of the solution at the equivalence point will be less than the pK a . 2. (3 pts) Which of the following statements is incorrect ? a. Liquids have more entropy than their corresponding solids. b. An aqueous salt solution has usually less entropy than the sum of the entropies of salt and water. c. Gases have more entropy than their corresponding liquids. d. Entropy of a substance increases as its temperature increases. e. The 2 nd law says all spontaneous processes produce an increase in the entropy of the universe 3. (3 pts) Arrange the following compounds in the order of increasing entropy: H 2 O(s) C(s, graphite) H 2 O(l) C(s, diamond) He(g) a. C(s, diamond) < H 2 O(s) < C(s, graphite) < H 2 O(l) < He(g) b. C(s, diamond) < C(s, graphite) < H 2 O(s) < H 2 O(l) < He(g) c. C(s, graphite) < C(s, diamond) < H 2 O(s) < He(g) < H 2 O(l) d. C(s, graphite) < H 2 O(s) < C(s, diamond) < He(g) < H 2 O(l) e. H 2 O(l) < C(s, diamond) < C(s, graphite) < H 2 O(s) < He(g) Final Exam...
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- Fall '08