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Carbonic Acid Is a Diprotic Weak Acid

Question 42

Multiple Choice

Carbonic acid is a diprotic weak acid.Which of the following balanced equilibria represents Ka2 for carbonic acid?


A) CO32−(aq) + H2O(l) D OH−(aq) + HCO3−(aq)
B) CO2(g) + H2O(l) D H2CO3(aq)
C) H2CO3(aq) + H2O(l) D H3O+(aq) + HCO3−(aq)
D) HCO3−(aq) + H2O(l) D OH−(aq) + H2CO3(aq)
E) HCO3−(aq) + H2O(l) D H3O+(aq) + CO32−(aq)

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