CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Four buffer solutions, each of equal volume, contain the same total concentration of conjugate pair (0.30 M) but different ratios.
Solution W 0.15 M HA and 0.15 M A⁻
Solution X 0.24 M HA and 0.06 M A⁻
Solution Y 0.06 M HA and 0.24 M A⁻
Solution Z 0.30 M HA and 0.00 M A⁻
After 0.010 mol of HCl(aq) is added to each solution, the pH of which solution will decrease the most?
(a) Solution Y
(b) Solution X
(c) Solution Z
(d) Solution W