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Weak acids dissociate partially in aqueo...

Weak acids dissociate partially in aqueous medium. If any common ion is present in the solution, the degree of dissociation of the acid is suppressed however the dissociation constant value remains constant.
In which of the following the degree of dissociation of water is maximum '?

A

`0.1 M NH_3`

B

` 0.1 M HCl`

C

` 0.1 M HCN`

D

Pure water

Text Solution

Verified by Experts

The correct Answer is:
D
In presence of acid (or ) base , the `. alpha. " of " H_2O ` decreases
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