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If the PK Values for Phosphoric Acid Are 2

Question 18

Multiple Choice

If the pK values for phosphoric acid are 2.15, 6.82 and 12.38, at what pH would one observe equal amounts of H₂PO₄^- and HPO₄^2-?

A) 2.15
B) 4.49
C) 6.82
D) 9.60
E) 12.38

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