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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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