Question

The conductometric titration curve for $C{H}_{3}COOH$ against $NaOH$ can be given as

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

When weak acid is titrated against strong base, itn the begining the conductance increase marginally and after equivalence point it increase steeply.

When $C{H}_{3}COOH$ get neutralised when reaction with $NaOH$.

The neutralisation reaction is,
$C{H}_{3}COOH+NaOH\to C{H}_{3}COONa+H_{2}O$

The formed salt will undergo hydrolysis reaction.
$C{H}_{3}CO{O}^{-}+H_{2}O\rightleftharpoons C{H}_{3}COOH+H{O}^{-}$

Due to the common ion effect of $C{H}_{3}COONa$, the dissociation of acetic acid is suppressed during titration.

Overall the conductivity increases, as the conducting power of sodium acetate is more than that of the feebly ionised acetic acid.