1. Determine the percent ionization in a 0.025 M lactic acid (HC3H5O3). The Ka of lactic acid is 1.4 × 10–4. 2. What is the pH of a solution that is 0.0054 M in HClO4 and 0.0029 M in HCl? 3. Determine the major species in a solution that is 0.152 M HF and 0.0023 M HCl. What is the pH? The Ka for HF is 6.8 × 10–4. 4. What is the pH of a 0.087 M methylamine (CH3NH2) solution? The Kb of methylamine is 4.38 × 10–4. 5. Determine if each of the following salts are acidic, basic, or neutral. a. b. c. d. NaClO AlCl3 KBr NH4Br 6. What is the pH of a 0.25 M NH4Br solution? The Kb of NH3 is 1.8 × 10–5. 7. Bleach is a solution that contains sodium hypochlorite. What is the pH of a solution that contains 0.125 M NaOCl? The Ka of HOCl is 2.95 × 10–8.

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