Answer
Please see the work below.
Work Step by Step
a. $2NH_3\rightarrow \leftarrow N_4^{+}+NH_2^-$
b. $NH_2^-$ is the conjugate base of $NH_3$ hence $NaH_2$ will be a base.
c. $NaNH_2+NH_4Cl\rightarrow 2NH_3+NaCl$
General Chemistry 10th Edition
by Ebbing, Darrell; Gammon, Steven D.
Published by
Cengage Learning
ISBN 10:
1-28505-137-8
ISBN 13:
978-1-28505-137-6
Chapter 15 - Acids and Bases - Questions and Problems - Page 662: 15.126
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