First slide

Salt hydrolysis :

Question

Regarding aqueous solution of Potassium Cyanide, correct statements are
A) Solution is alkaline in nature B) It undergoes anionic hydrolysis
C) It remains colourless by the addition of Phenolpthalein D) Its hydrolysis constant depends on $K_{a}$ of weak acid

Moderate

A

A, B, C only
B

A, B, D only
C

A, B, C, D
D

A, C only

Solution

${CN}^{-} + H_{2} O ⇌ HCN + {OH}^{-}; Undergoes anionic hydrolysis and the solution is alkaline; Thus it gives pink colour with Phenolpthalein; K_{h} = \frac{K_{w}}{K_{a}}$

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