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(C) The degree of hydrolysis $(h)$ for a salt of a weak acid and a weak base is given by the formula $h = \sqrt{K_h}$.Since $K_h = \frac{K_w}{K_a 	im

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$NH_4CN, CH_3COONH_4$

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(C) The degree of hydrolysis $(h)$ for a salt of a weak acid and a weak base is given by the formula $h = \sqrt{K_h}$.Since $K_h = \frac{K_w}{K_a 	imes K_b}$,the expression for $h$ does not contain the concentration term $(C)$.Therefore,the degree of hydrolysis for salts formed from a weak acid and a weak base is independent of dilution.Both $NH_4CN$ and $CH_3COONH_4$ are salts of a weak acid and a weak base.

For which of the following pairs of salts is the degree of hydrolysis independent of dilution?

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