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