Answer
See the answer below.
Work Step by Step
$K_{b,NH_3}=1.8\cdot10^{-5}$
$H_3O^++NH_3\leftrightarrow NH_4^++H_2O$
$K\approx[NH_4^+]/[H_3O^+][NH_3]=K_{b,NH_3}/K_w$
$K=1.8\cdot10^9$
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 - Study Questions - Page 629f: 102
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