When CH_3 COOCH_3+HCl is titrated with NaOH then at neutral point...

When

\mathrm{CH}_3 \mathrm{COOCH}_3+\mathrm{HCl}

is titrated with

\mathrm{NaOH}

then at neutral point the colour of phenolphthalein becomes colourless from pink due to

Options

B. formation of $\mathrm{CH}_3 \mathrm{COOH}$ which acts as a weak acid

\mathrm{NaOH}

solution is taken in a conical flask with phenolphthalein indicator (pink colour)

and \mathrm{CH}_3 \mathrm{COOCH}_3+\mathrm{HCl}

solution is added from burette slowly. First,

\mathrm{HCl}

left after hydrolysis of ester (being a strong acid) gets consumed then

\mathrm{CH}_3 \mathrm{COOH}

being a weak acid will bring the titration to the neutralisation point.

\begin{aligned} & \mathrm{CH}_3 \mathrm{COOCH}_3 \frac{\mathrm{H}_2 \mathrm{O}}{\mathrm{H}^{+}} \rightarrow \mathrm{CH}_3 \mathrm{COOH}+\mathrm{CH}_3 \mathrm{OH} \\ & \mathrm{HCl}+\mathrm{NaOH} \longrightarrow \mathrm{NaCl}+\mathrm{H}_2 \mathrm{O} \\ & \mathrm{CH}_3 \mathrm{COOH}+\mathrm{NaOH} \longrightarrow \mathrm{CH}_3 \mathrm{COONa}\end{aligned}