# 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 s

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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 the carbonic acid.
A. The concentrations of H^(+) and HCO_(3)^(-) are approximately equal.
B. The concentration of H^(+) is double that of CO_(3)^(-).
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)^(-).

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H_(2)CO_(3)hArr H^(+)HCO_(3)^(-), K_(1)=4.2xx10^(-7)
HCO_(3)^(+)hArrH^(+)+CO_(3)^(2-),K_(2)=4.8xx10^(-11)
As K_(2)lt lt K, concentrations of H^(+) and HCO_(3)^(-) will be approximately equal.