H₃PO₃ Is a Diprotic Weak Acid $\rightleftharpoons$ H₃O⁺(aq) + H₂PO₃^-(aq)
B) H₂PO₃^-(aq) + H₂O(l)

question 45

Multiple Choice

H₃PO₃ is a diprotic weak acid. What is the balanced equilibrium defined as K_b2 of H₃PO₃?

• A) H₃PO₃(aq) + H₂O(l) \(\rightleftharpoons\) H₃O⁺(aq) + H₂PO₃^-(aq)
• B) H₂PO₃^-(aq) + H₂O(l) \(\rightleftharpoons\) H₃O⁺(aq) + HPO₃^2-(aq)
• C) HPO₃^2-(aq) + H₂O(l) \(\rightleftharpoons\) OH^-(l) + H₂PO₃^-(aq)
• D) H₂PO₃^-(aq) + H₂O(l) \(\rightleftharpoons\) OH^-(l) + H₃PO₃(aq)
• E) HPO₃^2-(aq) + H₂O(l) \(\rightleftharpoons\) OH^-(aq) + H₃PO₃(aq)

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