Chapter 16, Problem 107FP

Apply the general method for solution equilibrium calculations outlined on pages 761-762 to determine the pH values of the following solutions. In applying the method, look for valid assumptions that may simplify the numerical calculations.

(a) a solution that is 0.315 M ${\text{CH}}_{\text{2}}\text{COOH}$ and 0.250M HCOOH

(b) a solution that contains 1.55 g ${\text{CH}}_{\text{2}}{\text{NH}}_{\text{2}}$ and 12.5 g ${\text{NH}}_2$ in 375mL.

(c) 1.0M ${\text{NH}}_{\text{4}}\text{CN}\left(\text{aq}\right)$