Chapter 12, Problem 12.120QP

Acetic acid is a weak acid that ionizes in solution as follows:

${\text{CH}}_3\text{COOH}(aq)\stackrel{}{\rightleftharpoons }{\text{CH}}_3{\text{COO}}^{-}(aq)+{\text{H}}^{+}(aq)$

If the freezing point of a 0.106 m CH₃COOH solution is −0.203°C, calculate the percent of the acid that has undergone ionization.