1.

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

Answer»

The concentration of `CO_(3)^(2-)` is 0.034 M
The concentration of `CO_(3)^(2-)` is GREATER than that of `HCO_(3)^(-)`
The concentration of `H^(+)andHCO_(3)^(-)` are approximately equal
The concentration of `H^(+)` is double that of `CO_(3)^(2-)`

Solution :`K_(1)gtgtK_(2)`, i.e., SECOND dissociation is practically negligible


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