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 `0.034M` solution of the carbonic acid.

Options

A. The concentration of `H^(+)` is double that of `CO_(3)^(2-)`
B. The concentration of `CO_(3)^(2-)` is 0.034 M.
C. The concentration of `CO_(3)^(2-)` is greater than that of `HCO_(3)^(2-)`.
D. The concentration of `H^(+) and HCO_(3)^(2-)` are approximately equal.

Answer

D