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The first and second dissociation consta...

The first and second dissociation constants of an acid, `H_(2) A` are `1.0 xx 10^(-5) and 5.0 xx 10^(-10)` respectively. 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:
C
`K _(4) = K _(a _(1)) xx K _(a _(2)) = 1 xx 10 ^(5) xx 5 xx 10 ^(-10) = 5 xx 10 ^(-15)`
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