Problem: What is the pH of a solution that has an acetic acid concentration of 0.050 M and a sodium acetate concentration of 0.075 M?A 4.92B. 9.30C. 7.50D. 1.30E. 1.12

FREE Expert Solution

We’re being asked to calculate the pH of a solution that has an acetic acid concentration of 0.050 M and a sodium acetate concentration of 0.075 M.


A solution that contains a weak acid and its conjugate base is a buffer solution. The pH of a buffer solution can be determined using the Henderson-Hasselbalch equation.

pH=pKa+log (conjugate baseweak acid)


Given solution:

The solution is composed of 0.050 M acetic acid and 0.075 M sodium acetate

 acetic acid (CH3COOH) is a weak acid
 the anion in sodium acetate (NaCH3COO) is the conjugate base

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Problem Details

What is the pH of a solution that has an acetic acid concentration of 0.050 M and a sodium acetate concentration of 0.075 M?

A 4.92

B. 9.30

C. 7.50

D. 1.30

E. 1.12