In aqueous solution the ionization constants for carbonic acid area $K_1=4.2 \times 10^{-}$ and $K_2=4.8 \times 10^{-11}$ Select the correct statement for a saturated 0.034 M solution of the carbonic acid.

Question

( A ) The concentration of $CO^{2-}_3$ is 0.034 M.
( B ) The concentration of $H^+$ and $HCO^{-}$ are approximately equal.
( C ) The concentration of $H^{+}$ is double that of $CO_2^{-3}$
( D ) The concentration of $CO_{2-}$ is greater than that of $HCO_3^{-} $