\textbf{97.} Solutions of two weak acids HA and HD are placed in two separate containers at an equilibrium concentration of $0.05$ molar. If the ionization constant of HD to the ionization constant of HA is approximately $10^{-3}$, the pH of solution HA ................... and the pH of solution HD ................... is.
\begin{itemize}
\item[(1)] $1/3$ - smaller \hspace{1cm} (2) $3$ - smaller \hspace{1cm} (3) $1/3$ - larger \hspace{1cm} (4) $3$ - larger
\end{itemize}