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Q. Addition of sodium acetate to $0.1 \,M$ acetic acid will cause

WBJEEWBJEE 2008Equilibrium

Solution:

Addition of sodium acetate in acetic acid solution, due to common ion $NH _{4}^{+}$, The supressed, ionisation of acetic acid so concentration of $\left[ H ^{+}\right]$decreases. Hence, $pH$ of solution increases.