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The first and second dissociation consta...

The first and second dissociation constant of an acid `H_(2)A` are `1.0xx10^(-5)` and `5.0xx10^(-10)` repectively. The overall dissociation constant of the acid will be

A

`0.2 xx 10^(5)`

B

`5.0 xx 10^(-5)`

C

`5.0 xx 10^(-15)`

D

`5.0 xx 10^(-15)`

Text Solution

Verified by Experts

The correct Answer is:
D
The overall dissociation constant (k).
`K = K_(1) xx K_(2) =(1xx 10^(-5))xx(5 xx 10^(-10))`
`=5 xx 10^(-15)`.
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