Chapter 16, Problem 58PS

Calculate the pH of a 0.12 M aqueous solution of the base aniline, ${\text{C}}_{\text{6}}{\text{H}}_{\text{5}}{\text{NH}}_{\text{2}}$ $\left(K_{\text{b}}\text{= 4}{\text{.0×10}}^{-\text{10}}\right)$.

${\text{C}}_{\text{6}}{\text{H}}_{\text{5}}{\text{NH}}_{\text{2}}{\text{(aq) + H}}_{\text{2}}\text{O(}\mathcal{l}\text{) }\rightleftharpoons {\text{C}}_{\text{6}}{\text{H}}_{\text{5}}{\text{NH}}_{\text{3}}{}^{\text{+}}{\text{(aq) + OH}}^{-}\text{(aq)}$