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Answer_Key_15834 - concentration of solution(becomes basic...

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Answer Key to Exam 1 Practice Test 1. E 2. D 3. A 4. E 5. B 6. A 7. E 8. D 9. B 10. D 11. E 12. A 13. E 14. D 15. B 16. C 17. B 18. A 19. B 20. D 21. B 22. B 23. B 24. E 25. B 26. C 27. E 28. B 29. A 30. A 31. E; question on H 2 CO 3 H + + HCO 3 - buffer system: HCl added HCl dissociates to H + + Cl - , adding extra H + to solution (becomes acidic); to counteract this, the extra H + is bound up by HCO 3 - to form H 2 CO 3 . NaOH added dissociates to Na + + OH - ; the OH - binds H + to form H 2 O, this lowers H
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Unformatted text preview: + concentration of solution (becomes basic); to counteract this, more H 2 CO 3 dissociates to form H + counteracting the previous loss of H+. Both actions by the buffer (i.e., response to addition of acid or base) results in maintaining of pH within the range of the buffer. 32. C 33. A 34. D 35. E 36. B 37. B 38. D 39. C 40. A 41. E 42. E 43. C 44. C 45. C 46. C 47. B 48. A 49. D 50. B...
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