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If a salt of strong acid and weak base h...

If a salt of strong acid and weak base hydrolyses appreciably `(alpha=0.1),` which of the following formula is to be used to calculate degree of hydrolsis 'alpha'?

A

`alpha=sqrt(K_(w))/(K_(a).a)`

B

`alpha=sqrt(K_(w))/(K_(b).a)`

C

`alpha=sqrt(K_(w))/(K_(a).K_(b)`

D

None of these

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The correct Answer is:
b
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