Consider the reaction CO₃^2-(aq) + H₂O(l) $\rightleftharpoons$ HCO₃^-(aq) + OH^-(aq). K_b for CO₃^2- is 2.1 × 10^-4 at 25°C. What is K_a for the HCO₃^- ion at 25°C?

Question

Quizplus · Accepted Answer

The relationship between Kb and Ka for a conjugate acid-base pair is given by the equation: Ka × Kb = Kw, where Kw is the ion product of water (1.0 × 10^-14 at 25°C). Therefore, Ka = Kw / Kb = (1.0 × 10^-14) / (2.1 × 10^-4) = 4.8 × 10^-11.

Consider the Reaction CO32-(aq) + H2O(l) ⇌\rightleftharpoons⇌ HCO3-(aq) + OH-(aq)

Consider the Reaction CO₃^2-(aq) + H₂O(l) $\rightleftharpoons$ HCO₃^-(aq) + OH^-(aq)