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CBSE Class 11-science Answered

what is hydrolysis constant?
Asked by | 10 Nov, 2013, 07:20: PM
Expert Answer

A hydrolysis constant is an equilibrium constant for a hydrolysis reaction.

For example, if a metal salt such as AlCl3 dissolves in an aqueous solution, the metal cation behaves as a Lewis acid and hydrolyzes the water molecules in the solvent.

Al3+ + 2H2O → AlOH2+ + H3O+

The hydrolysis constant for this reaction is as shown:

Khydrolysis = [H3O+] * [AlOH2+] / [Al3+]

In a more generalized form, the hydrolysis constant can be described as:

Ka = [H3O+] * [A] / [HA]

Where A− represents any base, and HA represents any acid.

Answered by Hanisha Vyas | 11 Nov, 2013, 11:54: AM
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