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Question

The percentage hydrolysis in 0.003M aqueous solution of NaI=OCN (Ka for HOCN is 3.33×104M) is 0.0X%. The value of X is

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Solution

For salt of weak acid- strong base,
Hydrolysis constant Kh=KWKa
And degree of hydrolysis h=KhC
h=KWKaC=10143.333×104×3×103
h=1.0005×104
Percentage hydrolysis =h×100=0.01%
Hence, X=1

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