What is the pH of an acetic acid solution where the concentration of acetic acid is 2 mM and the concentration of sodium acetate is 20 mM. The pK_a of acetic acid is 4.76.

Question

Quizplus · Accepted Answer

The pH can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]), where [A-] is the concentration of the acetate ion and [HA] is the concentration of acetic acid. Substituting the given values, pH = 4.76 + log(20/2) = 4.76 + 1 = 5.76.

What Is the PH of an Acetic Acid Solution Where