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Acid Dissociation Constants for Phosphoric Acid Are Given Below

Question 98

Multiple Choice

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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