1.

$\begin{array}{cc} \begin{array}{|c|} \hline 50\text{ mL} \\ 0.5\text{ M} \\ \text{CH}_3\text{COOH} \\ \text{K}_a = 1.8 \times 10^{-5} \\ \hline \end{array} & \begin{array}{|c|} \hline 6\text{ mL} \\ 2\% \text{ (w/V)} \\ \text{NaOH} \\ \hline \end{array} \\ \text{A-দ্রবণ} & \text{B-দ্রবণ} \end{array}$