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What Is the Second Stepwise Equilibrium Constant Expression for Phosphoric

Question 129

Multiple Choice

What is the second stepwise equilibrium constant expression for phosphoric acid H3PO4?


A) Ka2 = ([H3O+][H2PO4-]) /([H3PO4])
B) Ka2 = ([H3O+]2[HPO42-]) /([H3PO4])
C) Ka2 = ([H3O+]3[PO43-]) /([H3PO4])
D) Ka2 = ([H3O+][HPO42-]) /([H2PO4-])

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