Two acetate buffers are prepared.
• Buffer A: 0.10 M CH₃COOH and 0.10 M CH₃COO⁻
• Buffer B: 0.50 M CH₃COOH and 0.50 M CH₃COO⁻
A small, identical amount of strong acid is added to each. Identify which buffer better resists the pH change and state the reason in one sentence.