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Acid Dissociation Constants for Phosphoric Acid Are Given Below

Question 17

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Acid dissociation constants for phosphoric acid are given below. Acid dissociation constants for phosphoric acid are given below. A buffer with a pH = 7.4 can best be made by using A) H<sub>3</sub>PO<sub>4</sub> and NaH<sub>2</sub>PO<sub>4</sub>. B) NaH<sub>2</sub>PO<sub>4</sub><sup> </sup>and Na<sub>2</sub>HPO<sub>4</sub>. C) Na<sub>2</sub>HPO<sub>4</sub> and Na<sub>3</sub>PO<sub>4</sub>. D) only NaH<sub>2</sub>PO<sub>4</sub>. E) only Na<sub>2</sub>HPO<sub>4</sub>. A buffer with a pH = 7.4 can best be made by using


A) H3PO4 and NaH2PO4.
B) NaH2PO4 and Na2HPO4.
C) Na2HPO4 and Na3PO4.
D) only NaH2PO4.
E) only Na2HPO4.

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