In aqueous solution the ionization constants for carbonic acid are {\K}_1=4.2 \times 10^{-7} and {\K}_2=4.8 \times 10^{-11} Select the correct statement for a saturated 0.034 {\M} solution of the carbonic acid. [AIEEE 2010]

Correct Answer is : The concentration of H+and HCO3−are approximately equal.

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}^{+}and {\HCO}_3^{-}are approximately equal.

The concentration of {\H}^{+}is double that of {\CO}_3^{-}.

AIEEE 2010 Solved Paper

Section: Chemistry

Question : 9 of 89

Marks: +1, -0

In aqueous solution the ionization constants for carbonic acid are K1=4.2×10−7 and K2=4.8×10−11
Select the correct statement for a saturated 0.034M solution of the carbonic acid.

[AIEEE 2010]

The concentration of CO32− is 0.034M.
The concentration of CO32− is greater than that of HCO3−
The concentration of H+and HCO3−are approximately equal.
The concentration of H+is double that of CO3−.

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