Two 1.0 L buffer solutions each contain a total of 0.50 mol of the acetic acid/acetate pair.
• Buffer X: 0.35 mol CH₃COOH and 0.15 mol CH₃COO⁻
• Buffer Y: 0.15 mol CH₃COOH and 0.35 mol CH₃COO⁻
A chemist plans to add 0.010 mol of HCl to each solution.
Identify which buffer will better resist a decrease in pH and justify your choice in one sentence.