Phosphoric acid has pKa values of pKa1 = 2.15, pKa2 = 7.20, and pKa3 = 12.35. Which species is most abundant at pH = 11.5? | Acids and Bases

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Question

Phosphoric acid has pKa values of pKa₁ = 2.15, pKa₂ = 7.20, and pKa₃ = 12.35. Which species is most abundant at pH = 11.5?

H₃PO₄

H₂PO₄ –

HPO₄ 2–

✓ Correct

PO₄ 3–

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