Phosphoric Acid,H₃PO₄,will Undergo Three Successive Ionization Reactions to Varying Extents

question 112

Multiple Choice

Phosphoric acid,H₃PO₄,will undergo three successive ionization reactions to varying extents in water.What is the balanced equilibrium identified as K_a3?

• A)H₂PO₄^-(aq)+ H₂O(l) H₃O⁺(aq)+ HPO₄^2-(aq)
• B)HPO₄^2-(aq)+ H₂O(l) PO₄^3-(aq)+ H₃O⁺(aq)
• C)H₂PO₄^-(aq)+ H₃O⁺(aq) H₃PO₄(aq)+ H₂O(l)
• D)H₃PO₄(aq)+ H₂O(l) H₃O⁺(aq)+ H₂PO₄^-(aq)
• E)PO₄^3-(aq)+ H₂O(l) HPO₄^2-(aq)+ OH^-(aq)

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