Calculate the $pH$ of a $0\mathrm{.}15M$ solution of sodium acetate $(CH3\frac{C}{O}ONa).$ What is the percent hydrolysis? Ka of acetic acid is $1\mathrm{.}810-5.$

The following reaction has been studied in a series of $4$ experiments:

$C_2{H}_{5}Br+O{H}^{-}{C}_2{H}_{5}OH+B{r}^{-}$

$\backslash$table$[[$Experiment$,$Concentration, $M(mold{m}^{-3}),$Initial rate$],[C_2{H}_{5}Br,$NaOH,$(\frac{M}{s})$