Acid Dissociation Constants for Phosphoric Acid Are Given Below

question 4

Multiple Choice

Acid dissociation constants for phosphoric acid are given below. 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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