1 / 68

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

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. Review Drill & Check HW. CHM II HW. Review PP-24. Complete the attached assignment & turn it in tomorrow. Salt or Hydrolysis Reactions. Hydrolysis.

nuala
Download Presentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Drill: Calculate the pH of 0.10 M H2Z in 0.50 M KHZ.Ka1 = 2.0 x 10-5 Ka2 = 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 orHydrolysis 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. Salts • 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- + H2O HA + OH- • B+ + H2O H+ + BOH

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

  17. Salt or Hydrolysis Problems

  18. Drill:Calculate the pH of a solution of 0.10 M NH3 in 0.20 NH4Cl.Kb NH3 = 1.8 x 10-5

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

  20. Salt Problem • Calculate the pH of a 0.10 M solution of R-NH3Cl • Kb R-NH2 = 2.5 x 10-5

  21. Drill: Calculate the pH of a 0.18 M solution of KC2H3O2 • Ka = 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 • NaAc MnCl2 • KNO3 NH4Br • KHSO4 NH4Ac

  31. Predict Relative pH • KAc NaCl • KClO2 NH4Cl • K2SO4 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 • Na2O SO2 • NO2 CO2 • CaO Al2O3

  36. Calculate the pH of a 0.16 M solution of KC7H5O2 • Ka = 6.4 x 10-5

  37. Calculate the pH of a solution of 0.0030 M KQ. • KaHQ = 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 NH4NO3 solution.KbNH3 = 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 H2CO3. Calculate the molarity of all ions present in the solution.Ka1 = 4.4 x 10-7Ka2 = 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. Ka HF = 6.5 x 10-4

  46. Calculate [H3PO4], [H2PO4-1], [HPO4-2], [PO4-3], [K+], [H+], & pH of 1.0 M KH2PO4 in 0.50 M K2HPO4. Ka1 = 7.5 x 10-3Ka2 = 6.2 x 10-8Ka3 = 4.2 x 10-13

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

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

  49. Calculate pH of: 0.20 M MOHin 0.50 M MCl Kb = 5.0 x 10-5

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

More Related