1. Drill: Calculate the pH of 0.10 M H 2 Z in 0.50 M KHZ. K a1 = 2.0 x 10 -5 K a2 = 5.0 x 10 -9

2. Review Drill & Check HW

3. CHM II HW Review PP-24. Complete the attached assignment & turn it in tomorrow.

4. Salt or Hydrolysis Reactions

5. Hydrolysis Any reaction in which water is decomposed with all or part of its decomposition portions combining with the products

6. Hydrolysis Water is added to decompose something

7. Hydrolysis MX + HOH HX + MOH

8. Salts

9. Ionic compounds that dissolve ~ 100 % in water

10. Salts of Acids Salts of acids are negative (A - )

11. Salts of Bases Salts of bases are Positive (M + or B + )

12. Salt Solutions When salts dissolve, their ions can recombine with water

13. Salt Solutions The salts of weak acids can recombine with water producing basic solutions

14. Salt Solutions The salts of weak bases can recombine with water producing acidic solutions

15. Salt Solutions A - + H 2 O HA + OH - B + + H 2 O H + + BOH

16. Drill: Calculate the salt/acid ratio of a solution of benzoic acid & sodium benzoate at a pH of 5.00. K a HBz = 6.4 x 10 -5

17. Salt or Hydrolysis Problems

18. Drill: Calculate the pH of a solution of 0.10 M NH 3 in 0.20 NH 4 Cl. K b NH 3 = 1.8 x 10 -5

19. Salt Problem Calculate the pH of a 0.20 M solution of NaBz K a HBz = 6.4 x 10 -5

20. Salt Problem Calculate the pH of a 0.10 M solution of R-NH 3 Cl K b R-NH 2 = 2.5 x 10 -5

21. Drill: Calculate the pH of a 0.18 M solution of KC 2 H 3 O 2 K a = 1.8 x 10 -5

22. Review Drill & Check HW

23. Collect Labs

24. CHM II HW Study for a quiz tomorrow Test Monday

25. AP CHM HW Read: Chapter 14 Problems: 43 Page: 422

26. CHM II HW Read: Chapter 18 Problems: 83 Page: 790

27. Salt Applications Salts of strong acids & weak bases make acidic solutions

28. Salt Applications Salts of strong bases & weak acids make basic solutions

29. Salt Applications Salts of strong acids & strong bases make neutral solutions

30. Predict Relative pH NaAcMnCl 2 KNO 3 NH 4 Br KHSO 4 NH 4 Ac

31. Predict Relative pH KAcNaCl KClO 2 NH 4 Cl K 2 SO 4 NaI

32. Anhydrides Compounds without water; that when added to water, form other compounds

33. Acid Anhydrides Non-metal oxides that form acids when added to water

34. Basic Anhydrides Metal oxides that form bases when added to water

35. Predict Relative pH Na 2 OSO 2 NO 2 CO 2 CaOAl 2 O 3

36. Calculate the pH of a 0.16 M solution of KC 7 H 5 O 2 K a = 6.4 x 10 -5

37. Calculate the pH of a solution of 0.0030 M KQ. K a HQ = 3.0 x 10 -5

38. AP CHM HW Read: Chapter 14 Problems: 35 Page: 422

39. CHM II HW Read: Chapter 18 Problems: 67 & 75 Page: 789-790

40. Drill: Calculate the pH of a 0.72 M NH 4 NO 3 solution. K b NH3 = 1.8 x 10 -5

41. A/B eq, Buffer & Salt Hydrolysis Problems

42. AP Test Thursday

43. 11.2 g of KOH was added to 2.0 L of 0.075 M H 2 CO 3. Calculate the molarity of all ions present in the solution. K a1 = 4.4 x 10 -7 K a2 = 4.8 x 10 -11

44. You need to make a buffer solution with its greatest buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

45. Calculate the pH of 0.10 M HF. K a HF = 6.5 x 10 -4

46. Calculate [H 3 PO 4 ], [H 2 PO 4 -1 ], [HPO 4 -2 ], [PO 4 -3 ], [K + ], [H + ], & pH of 1.0 M KH 2 PO 4 in 0.50 M K 2 HPO 4. K a1 = 7.5 x 10 -3 K a2 = 6.2 x 10 -8 K a3 = 4.2 x 10 -13

47. Calculate the pH of 0.10 M HF in 0.20 M NaF. K a HF = 6.5 x 10 -4

48. Calculate the pH of 5.0 M KCN. K aHCN = 5.0 x 10 -10

49. Calculate pH of: 0.20 M MOH in 0.50 M MCl K b = 5.0 x 10 -5

50. Calculate pH of: 0.20 M MCl K b = 5.0 x 10 -5

51. Drill: Calculate the pH of 0.20 M KQ. K a HQ = 8.0 x 10 -5

52. Predict Relative pH KAcNaCl KClO 2 NH 4 Cl K 2 SO 4 NaI

53. Predict Relative pH K 2 OMgO ClO 2 (NH 4 ) 2 O SO 3 N 2 O 3

54. Calculate pH of: 0.20 M HNO 2 K a = 2.0 x 10 -4

55. Calculate pH of: 3.0 M HZ in 2.0 M KZ K a HZ = 3.0 x 10 -5

56. Calculate pH of: 0.20 M KR K a HR = 2.0 x 10 -5

57. Calculate pH of: 2.0 M HQ K a = 2.0 x 10 -6

58. Calculate pH of: 0.60 M HZ in 0.90 M KZ K a HZ = 3.0 x 10 -5

59. Calculate pH of: 0.20 M KQ K a HQ = 2.0 x 10 -7

60. 1.5 L of 0.25 M Ba(OH) 2 was added to 1.0 L of 0.60 M H 2 SO 3. Calculate [H 2 SO 3 ], [HSO 3 - ], [SO 3 -2 ], [H + ], [OH - ], & pH of the solution. K a1 = 1.7 x 10 -2 K a2 = 6.0 x 10 -8

61. Review of Acid/Base descriptions and Acid/Base, Buffer, & Salt Equilibria

62. Arhenius, Bronsted- Lowry, & Lewis Acids & Bases

63. Strong Acids Strong Bases

64. Acid rxns Base rxns

65. A/B Equilibrium Constants K W, K A, K B, & pH

66. Calculate pH of: 0.025 M HNO 3 0.020 M KOH

67. 150 mL of 0.10 M KOH was added to 100.0 mL of 0.10 M H 2 CO 3. Calculate [H 2 CO 3 ], [HCO 3 - ], [CO 3 -2 ], [H + ], [OH - ], & pH of the solution. K a1 = 4.4 x 10 -7 K a2 = 4.7 x 10 -11

68. Calculate [H 3 A], [H 2 A -1 ], [HA -2 ], [A -3 ], [K + ], [H + ], [OH - ], & pH of 2.0 M KH 2 A. K a1 = 4.0 x 10 -3 K a2 = 5.0 x 10 -8 K a3 = 2.5 x 10 -13