Which of the Following Chemical Equations Corresponds to K_a3 for Phosphoric

question 28

Multiple Choice

Which of the following chemical equations corresponds to K_a3 for phosphoric acid,H₃PO₄?

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

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