Chapter 16, Problem 16.99SP

A typical aspirin tablet contains 324 mg of aspirin (acetylsalicylic acid, ${\text{(C}}_{\text{9}}{\text{H}}_{\text{8}}{\text{O}}_{\text{4}}\text{)}$ , a monoprotic acid having ${\text{K}}_{\text{a}}\text{ = 3}\text{.0}\times {\text{10}}^{\text{-4}}.$ If you dissolve two aspirin tablets in a 300 mL glass of water, what is the pH of the solutions and the percent dissociation?