If the ${\wedge }_m^0$ for $KCl,HCl$ and $C{H}_{3}COOK$ are x, y and z $Sc{m}^{2}mo{l}^{-1}$respectively then ${\wedge }_m^0$ for $C{H}_{3}COOH$ will be ?

$\begin{array}{l}{\mathrm{CH}}_3\mathrm{COOK}+\mathrm{HCl}\to {\mathrm{CH}}_3\mathrm{COOH}+\mathrm{KCl}\\ \mathrm{Z}\mathrm{Y}\mathrm{X}\end{array}$