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When CH3COOH3+HCl is titrated with NaOH ...

When `CH_3COOH_3+HCl` is titrated with NaOH then at neutral point the colour of phenolphthalein becomes colourless from pink due to-

A

Formation of `CH_3OH`

B

formation of `CH_3COOH` which acts as a weak acid

C

phenolphthalein vaporises

D

presence of HCl

Text Solution

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NaOH solution is taken in a conical flask with phenolphthalein indicator (pink colour) and `CH_3COOCH_2+HCl` solution is added from burette slowly.
First, HCl left after hydrolysis of ester (being a strong acid) gets consumed then `CH_3COOH` being a weak acid will bring the titration to the neutralisation point.
`CH_3COOCH_3overset(H_2O)underset(H^+)toCH_3COOH+CH_3OH`
`HCl+NaOHtoNaCl+H_2O`
`CH_3COOH+NaOHtoCH_3COONa`
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