Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 16 - Section 16.8 - The Acid-Base Properties of Ions and Salts - For Practice - Page 755: 16.15


(a) $Li^+$ is pH-neutral; (b) $CH_3N{H_3}^+$ is a weak acid; (c) $Fe^{3+}$ is a weak acid.

Work Step by Step

(a) $Li^{+}$ is the cation of a strong base $(LiOH)$, therefore, it is pH-neutral. (b) $CH_3N{H_3}^+$ is the conjugate acid of a weak base $(CH_3NH_2)$. Thus, it is a weak acid. (c) $Fe^{3+}$ is a small and highly charged metal cation. Thus, it is a weak acid.
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