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Chemistry 102 Quiz 1A Dr. B. Jackson 1. Code A 2. A solution with a pOH of 2 is a) acidic b) basic c) neutral 3. What is the pH of a solution with which is 0.001 M HCl? a) 1 b) 2 c) 3 d) 4 e) 5 4. What is the pH of a solution which is 2.5 x 10-5 M HCl? a) 2.5 b) 4.6 c) 9.4 5. What is the pH of a solution which is 3.67 x 10-3 M KOH? a) 2.4 c) 3.6 c) 10.4 d) 11.6 6. What is the H+ concentration of a solution with a pH of 4? a) 4M b) 1 x 10-4 M c) 1 x 10-10 M 7. What is the H+ concentration of a solution witha pOH of 3? a) 11 M b) 1 x 10-3 M c) 1 x 10-11 M 8. What is the H+ concentration of a solution with a pH of 4.8? a) 1.58 x 10-5 M b) 4.8 x 10-3 M c) 6.3 x 10-10 M 9. If the equilibrium constant (Keq) is less than 1, the reaction favors a) the reactants b) the products 10. Given 2 SO2 + O2 <------> 2 S03
Which of the following is the expression for the equilibrium constant? a) Keq = [SO2] [O2] b) Keq = [SO2]2 [O2] __________ __________
[SO3] [SO3]2
c) Keq = [SO3] d) Keq = [SO3] 2 __________ __________ [SO2] [O2] [SO2]2 [O2] e) 2 [SO3] ___________ 2 [SO2] [O2] 11. A buffer is a mixture of a weak acid and a weak base. a) true b) false 12. When the concentration of a weak acid and its salt are the same, the pH equals the pKa. a) true b) false 13. The pH of blood in a healthy individual is 7.0. a) true b) false 14. If a person=s breathing is depressed by drugs, the blood pH will a) rise b) drop 15. What is the major buffer system in the blood? a) acetic acid/acetate b) lactic acid/lactate c) carbonic acid/bicarbonate 16. What is the pH of a buffer that contains 0.20 moles of formic acid and 0.15 moles of sodium formate? The pKa of formic acid 3.75. a) 3.63 b) 3.87 c) 4.50 d) 5.08 e) 3.00 1a;2b;3c;4b;5d;6b;7c;8a;9a;10d;11b;12a;13b;14b;15c; 16a |
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Wednesday, March 21, 2007 01:27:59 PM |