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The first and second dissociation consta...

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

A

`5.0xx10^(15)`

B

`5.0xx10^(-15)`

C

`0.2xx10^(5)`

D

`5.0xx10^(-5)`

Text Solution

Verified by Experts

The correct Answer is:
B
`K_("overall")=K_(a_(1))xxK_(a_(2))=1xx10^(-5)xx5xx10^(-10)`
`=5xx10^(-15)`.
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