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In aqueous solution the ionization const...

In aqueous solution the ionization constants for carbonic acid are :
`K_(1)=4.2xx10^(-7)` and `K_(2)=4.8xx10^(-11)`
Select the correct statement for a saturated 0.034 M solution of carbonic acid.

A

The concentration of `H^(+)` and `HCO_(3)^(-)` are approzimately equal.

B

The concentration of `H^(+)` is double that of `CO_(3)^(2-)`

C

The concentration of `CO_(3)^(2-)` is 0.034 M.

D

The concentration of `CO_(3)^(2-)` is greater than that of `HCO_(3)^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A
`H_(2)CO_(3)hArr H^(+)+CO_(3)^(2-), K_(2)=4.8xx10^(-11)`
Since `K_(1)gt gt K_(2)` Conc. of `H^(+)` and `HCO_(3)^(-)` are approximately equal.
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