Which solution has the lowest pH?
A)a buffer made with 0.10 M acetic acid and 0.01 M sodium acetate
B)a buffer made with 0.10 M acetic acid and 0.10 M sodium acetate
C)a buffer made with 0.01 M acetic acid and 0.10 M sodium acetate
D)a buffer made with 0.01 M acetic acid and 0.01 M sodium acetate
E)All of the buffers have the same pH since they are all made with acetic acid and sodium acetate.

Question

Quizplus · Accepted Answer

The pH of a buffer solution is determined by the Henderson-Hasselbalch equation, which relates pH to the ratio of the concentration of the conjugate base (A-) to the acid (HA). The solution with the lowest pH will have the highest ratio of HA to A-, which is option A, with 0.10 M acetic acid and 0.01 M sodium acetate.

Which Solution Has the Lowest PH