First slide

Basic Buffer

Question

Statement I : Mixture of 50 ml of 0.2M ${NH}_{4} OH$ and 25ml of 0.1M $HCl$ is a basic buffer
Statement II : Hydrolysis of a salt is reverse of neutralization

Moderate

A

Both statements I and II are correct
B

Statement - I is correct and statement - II is incorrect
C

Statement - I is incorrect and statement - II is correct
D

Both statements I and II are incorrect

Solution

I) Gram equivalents of WB = $\frac{50 (0 .2)}{1000} = 10^{- 2}$ ;
Gram equilents of SA= $\frac{25 \times 0.1}{1000} = 2.5 \times 10^{- 3}$ ;
Excess WA+ limited SB forms a basic buffer
$II) Salt + H_{2} O ⇌ Acid + Base . ... Hydrolysis$
$Acid + Base ⇌ Salt + water . .. Neutralization$

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