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  4. The pH of 0.1 M aqueous solutions of NaCl, CH3COONa and NH4Cl will follow the order

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Q. The $pH$ of $0.1\, M$ aqueous solutions of $NaCl$, $CH_3COONa$ and $NH_4Cl$ will follow the order

KVPYKVPY 2014Equilibrium

Solution:

$NaCl \left(NaOH + HCl\right)$ is a neutral salt, $NH_4Cl\left(HCl + NH_4OH\right)$ is an acidic salt while $CH_3COONa\left(CH_3COOH + NaOH\right)$ is a basic salt.
The value of $pH$ of acidic salt is less than 7, while for neutral salt $pH$ value is equal to 7 and for basic salt $pH$ value is greater than 7. Thus, the increasing order of $pH 0.1\, M$
aqueous solutions of $NaCl,CH_3COONa$ and $NH_4Cl$ will be
$NH_4Cl < NaCl < CH_3COONa$