Of the following solutions, which has the greatest buffering capacity?
A)1.15 M HF and 0.624 M NaF
B)0.574 M HF and 0.312 M NaF
C)0.287 M HF and 0.156 M NaF
D)0.189 M HF and 0.103 M NaF
E)They are all buffer solutions and would all have the same capacity.

Question

Quizplus · Accepted Answer

The buffering capacity of a solution is determined by the concentration and ratio of the weak acid and its conjugate base. In this case, HF and NaF are a weak acid and its conjugate base. The solution with the greatest buffering capacity will have a higher concentration of both HF and NaF. Option A has the highest concentration of both species, making it the solution with the greatest buffering capacity.

Of the Following Solutions, Which Has the Greatest Buffering Capacity