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

Question

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

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 $CO_3^−$.

Solution

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