Question

Your TA asks you to make 100 mL of a benzoic acid/benzoate buffer solution of pH = 3.84. The Ka of benzoic acid is 6.5 × 10–5 .

a) Determine the volumes of 0.50 M benzoic acid and 0.50 M sodium benzoate required to make 100.0 mL of a pH 3.84 buffer solution.

b) Determine the volumes of 0.50 M benzoic acid and 0.50 M sodium hydroxide required to make 100.0 mL of a pH 3.84 buffer solution.