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

question 86

Multiple Choice

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?

• A) 4.8 × 10³
• B) 4.8 × 10^-11
• C) 2.1 × 10^-4
• D) 7.2 × 10^-12
• E) 9.2 × 10^-8

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