Phosphoric Acid Is a Polyprotic Acid,with PK Values of 2

question 16

Multiple Choice

Phosphoric acid is a polyprotic acid,with pK values of 2.14,6.86,and 12.38.Which ionic form predominates at pH 9.3?

• A)H₃PO₄
• B)H₂PO₄¹⁻
• C)HPO₄²⁻
• D)PO₄³⁻
• E)none of the above

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