Which of the Following Equilibria Represents the Second Ionization Step

question 121

Multiple Choice

Which of the following equilibria represents the second ionization step of H₃PO₄?

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

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