Question

P19. (Sec. 16.4) Two Part Titration Question: A propionic acid solution, HC3H5O2, will be titrated with a sodium hydroxide, NaOH, solution. Part 1: What is the pH of the solution after adding 36 mL of 0.15 M NaOH to 50 mL of 0.108 M HC3H5O2? [Hint: Equivalence Point). Part 2: What is the pH of the solution after adding 75 mL of 0.15 M NaOH to the 50 mL of 0.108 M HC3H5O2 solution? (Propionic Acid: Ka = 1.3 x 10) a) Part 1: pH = 3.87; Part 2: pH=9.88 b) Part 1: pH = 11.64; Part 2: pH = 9.51 c) Part 1: pH = 8.84; Part 2: pH = 9.39 d) Part 1: pH = 9.51; Part 2: pH = 11.64 e) Part 1: pH = 8.84; Part 2: pH = 12.67 P20. (Sec. 16.4) Two Part Titration Question: A benzoic acid solution, HC H502, is titrated with a potassium hydroxide, KOH, solution. Part 1: What is the pH of a 100 mL sample of a 0.225 M HC-H502 solution? Part 2: What is the pH of the solution after adding 280 mL of 0.125 M KOH to the 100 mL sample of 0.225 M HC HsO2 solution? (Benzoic Acid: K = 6.5 x 104) a) Part 1: pH = 2.19; Part 2: pH = 10.83 b) Part 1: pH = 0.875; Part 2: pH = 13.04 c) Part 1: pH = 1.92: Part 2: pH = 12.51 d) Part 1: pH = 3.87; Part 2: pH=9.04 e) Part 1: pH = 1.92; Part 2: pH - 11.79