## Chemistry: The Molecular Science (5th Edition)

$Na_3PO_4$ and $Na_2HPO_4$ are capable of forming a buffer solution.
1. For a buffer solution, we need: - 1 Weak acid: $HP{O_4}^{2-}$ - 1 Weak base: ${PO_4}^{3-}$ 2. They can't react with each other. - Since they are a conjugate acid-base pair, that reaction will not happen. Therefore, this pair can make a buffer solution.