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What is the hydrolysis constant of a weak acid-weak base?

What is the hydrolysis constant of a weak acid-weak base? Correct Answer KW/KaKb

The hydrolysis constant of a weak acid and weak base is KW/KaKb, the degree of hydrolysis is √KW/KaKb and the pH of the solution is given by 1/2pKW + 1/2pKa – 1/2pKb. An example of a salt of a weak acid and a weak base is CH3COOHNH4.

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