$($This is a $3-$part problem, parts A$-$C$,$ please show all work, especially when it comes to B and C$,$ and show work for ICE tables if neccessary, thanks!$).$ A common weak acid used in biochemistry to make a buffer is HEPES, pKa $7\mathrm{.}5.$ Initially, the

HEPES was dissolved in water to a concentration of $0\mathrm{.}20$ M in $1$ L$.$

$($PART A$).$ Is this solution a buffer? $($PART B$).$ Determine the pH of this solution. $($PART C$).$The pH of weak acids cannot be determined by using the equation, pH $=-$log$[$H$3$O$+]$

because weak acids do not dissociate into A$-$ and H$3$O$+100\%$ in water. Based on part b$,$

determine what percent HEPES dissociates in water.