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PKa Values of Phosphoric Acid Are 2

Question 54

Multiple Choice

pKa values of phosphoric acid are 2.2,7.2 and 12.7.A phosphate buffer of pH = 7.4 can be prepared using

A) H₂PO₄- and HPO₄²-.
B) HPO₄²- and PO₄³-.
C) H ₃PO₄ and HCl.
D) None of the above.

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