Which salt from following forms aqueous solution having pH less t… - Vidyadip

MCQ

Which salt from following forms aqueous solution having pH less than 7 ?

A
$CH _3 COONa$
B
$Na _2 SO _4$
C
$CuSO _4$
D
$Na _2 CO _3$

✓

Answer

(c) : $\mathrm{CH}_3 \mathrm{COONa}$, salt of strong base and weak acid, has $\mathrm{pH}$ of 9.37 .
$\mathrm{Na}_2 \mathrm{SO}_4$, salt of strong acid and strong base, has $\mathrm{pH}$ of 7 .
$\mathrm{Na}_2 \mathrm{CO}_3$, salt of strong base and weak acid, has $\mathrm{pH}$ of $10-11$.
$\mathrm{CuSO}_4$, salt of weak base and strong acid, has acidic $\mathrm{pH}$ of less than 7 .

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