c
\(CH_3COONa + H_2O  \rightleftharpoons  CH_3COOH + NaOH\)

\(CH_3COO^{-}Na^+ + H_2O  \rightleftharpoons  CH_3COOH + Na^{+}OH^{-1}\) 

\(1\)                      \(0\)                                  \(0\)

\(\frac{{1 - x}}{v}\)            \(\frac{x}{v}\)              \(\frac{x}{v}\)

\([O{H^ - }] = C.x = {10^{ - 3}}\)

\([{H^ + }] = \frac{{{K_w}}}{{[O{H^ - }]}} = \frac{{{{10}^{ - 14}}}}{{{{10}^{ - 3}}}} = {10^{ - 11}}\)

\(pH = 11\)