1.

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.

Answer»

The concentration of `H^(+)` and `HCO_(3)^(-)` are approzimately EQUAL.
The concentration of `H^(+)` is double that of `CO_(3)^(2-)`
The concentration of `CO_(3)^(2-)` is 0.034 M.
The concentration of `CO_(3)^(2-)` is GREATER than that of `HCO_(3)^(-)`

Solution :`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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