Acetic acid (CH₃COOH) has a Ka of 1.8×10⁻⁵ at 25 °C.
(a) Calculate the pH of a 0.050 M solution of acetic acid.
(b) To 250 mL of this solution, 0.010 mol of NaOH is added. Assuming the volume change is negligible, calculate the pH of the resulting solution.

Question

Accepted Answer

(a) pH ≈ 3.02; (b) pH ≈ 5.36

Waec Model Questions Vol1 2020 Chemistry Question 10

Acetic acid (CH₃COOH) has a Ka of 1.8×10⁻⁵ at 25 °C.\n(a) Calculate the pH of a 0.050 M solution of acetic acid.\n(b) To 250 mL of this solution, 0.010 mol of NaOH is added. Assuming the volume change is negligible, calculate the pH of the resulting solution.

Answer Options

About This Question

Master the Exam!

Waec Model Questions Vol1 2020 Chemistry Question 10

Acetic acid (CH₃COOH) has a Ka of 1.8×10⁻⁵ at 25 °C.\n(a) Calculate the pH of a 0.050 M solution of acetic acid.\n(b) To 250 mL of this solution, 0.010 mol of NaOH is added. Assuming the volume change is negligible, calculate the pH of the resulting solution.

Answer Options

About This Question

Master the Exam!

Acetic acid (CH₃COOH) has a Ka of 1.8×10⁻⁵ at 25 °C.\n(a) Calculate the pH of a 0.050 M solution of acetic acid.\n(b) To 250 mL of this solution, 0.010 mol of NaOH is added. Assuming the volume change is negligible, calculate the pH of the resulting solution.