Question

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 0.034 M solution of the carbonic acid.
(a) The concentration of $CO_3^{2-}$ is 0.034 M.
(b) The concentration of $CO_3^{2-}$ is greater than that of $HCO_3^-$.
(c) The concentrations of H⁺ and $HCO_3^-$ are approximatelyequal.
(d) The concentration of H⁺ is double that of $CO_3^{2-}$.

Answer 1

C is a correct answer. .