A solution of methylamine $(C{H}_{3}N{H}_2),$ a weak base, has an initial concentration of $0\mathrm{.}350M.$ Methylamine has a $K_b$ of

$4\mathrm{.}4{10}^{-4}.$

Calculate the $pH$ of the solution.

$pH=,12\mathrm{.}16$

Calculate the percent of methylamine that is protonated.

percent protonated: