Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 19 - Acids, Bases, and Salts - 19 Assessment: 87

Answer

H3PO4 -> H+ + (H2PO4)- H2PO4 -> H+ + (HPO4)2- HPO4 -> H+ + (HPO4)3-

Work Step by Step

Recall that phosphoric acid has THREE dissociable protons. Therefore, in each stepwise ionization, it loses one respective proton.
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