# Chapter 16 Principles of Chemical Reactivity: The Chemistry of Acids and Bases - 16-1 The Bronsted-Lowry Concept of Acids and Bases - Review & Check for Section 16-1 - Page 588: 1

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#### Work Step by Step

$HPO_4^{2-}$ can be either a proton donor (still has one hydrogen), or proton acceptor (to $H_2PO_4^-$).

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