SOLUTIONS-midterm2_Spring2011-section-B

SOLUTIONS-midterm2_Spring2011-section-B -...

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Unformatted text preview: Name_____________KEY_____________________________ Student ID Number___________________________________ LAB Sec. # ____; TA: __________; Lab day/time: __________ Toby Allen Spring 2011 Section B CHEMISTRY 2B Midterm 2 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 extra sheet of the exam and refer to its page number in your response. A scientific calculator may be used (if it is a programmable calculator, its memory must be cleared before the exam). (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! Multiple Choice (write answers HERE ) Part I: 3 pts each 1. D 2. E 3. C 4. B 5. B 6. B 7. B 8. B 9. C 10. D 11. B 12. C 13. E 14. A 15. E Part II: 6 pts each 16. D 17. C 18. E 19. C Possible Points Points Part I (1-15) – 3 points each /45 Part II (16-19) – 6 points each /24 Part III (20) - 31 points /31 Total Score - 100 points total /100 Name: ____________________________________ Midterm Exam II (Page 2 of 9) Part I: Multiple Choice, Concepts, (3 points each) Write correct answer on cover sheet – No partial credit 1. (3pts) A chemical equilibrium is the point at which A. no further reaction can occur, even if more reactants are added B. both forward and reverse reactions stop C. the forward reaction ceases D. the forward and reverse reactions continue at the same rate E. all reactants have been converted to products 2. (3 pts) A strong base is A. a base that is very concentrated B. a proton acceptor that partially protonates in water C. a proton donor that fully deprotonates in water D. a proton donor that partially deprotonates in water E. a proton acceptor that fully protonates in water 3. (3 pts) This system will A. become more sad, B. remain unchanged, C. become more happy. 4. (3 pts) The pH of a 0.1 M solution of the strong electrolyte NH 4 NO 3 (aq) will be (give best answer) A. >7 B. <7 C. 7 D. 1 E. 13 5. (3 pts) Which of these bases is the strongest (you may use the data sheet as a guide)? A. Cl − B. N 3 − C. NO 3 − D. F- E. HSO 4- 6. Which of the following has the smallest pK b ?: A. B. C. D. Cl- Name: ____________________________________ Midterm Exam II (Page 2 of 9) Part I: Multiple Choice, Concepts, (3 points each) Write correct answer on cover sheet – No partial credit 1. (3pts) A chemical equilibrium is the point at which A. no further reaction can occur, even if more reactants are added B. both forward and reverse reactions stop B....
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This note was uploaded on 07/09/2011 for the course CHE 2B 2B taught by Professor Tobyallen during the Spring '11 term at UC Davis.

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SOLUTIONS-midterm2_Spring2011-section-B -...

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