Answer
Please see the work below.
Work Step by Step
The chemical equation is
$HCN+H_2O\rightarrow \leftarrow H_3O^{+}+CN^{-}$
The equilibrium constant is given as
$K_a=\frac{[H_3O^+][CN^-]}{[HCN]}$
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 16 - Acid-Base Equilibria - Questions and Problems - Page 700: 16.1
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