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

Published by Cengage Learning

# Chapter 14 - Acids and Bases - Questions for Review and Thought - Topical Questions - Page 652a: 15b

#### Answer

$NH_3$ and $N{H_2}^-$ are a conjugate acid-base pair.

#### Work Step by Step

- Fast method: A conjugate acid-base pair has exactly one $H^+$ as a difference. So this is a valid pair. - Other method: 1. Identify the base: - $N{H_2}^-$ 2. Add a $H^+$ to it: - $NH_3$ Compare with the other substance: $N{H_3} = N{H_3}$ - So, this is a conjugate acid-base pair.

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