Answer
C
Work Step by Step
$HPO_4^{2-}$ can be either a proton donor (still has one hydrogen), or proton acceptor (to $H_2PO_4^-$).
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
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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