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Successive dissociation constants of H(2...

Successive dissociation constants of `H_(2)CO_(3)` are `K_(a_(1)) = 10^(-3)` and `K_(a_(2)) = 10^(-6)`. An aqueous solution contains `0.1 MH_(2)CO_(3)` and `0.1 M HCI` at `25^(@)C`
The concentration of `CO_(3)^(2-)` at equilibrium in solution is: (approximately)

A

`10^(-6)M`

B

`10^(-12)M`

C

`10^(-10)M`

D

`10^(-8)M`

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The correct Answer is:
d
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Successive dissociation constants of H_(2)CO_(3) are K_(a_(1)) = 10^(-3) and K_(a_(2)) = 10^(-6) . An aqueous solution contains 0.1 MH_(2)CO_(3) and 0.1 M HCI at 25^(@)C If solution contains only 0.1 M H_(2)CO_(3) then the concentration of CO_(3)^(2-) at equilibrium in the solution will be :

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