Answer
$Acids: {NH_4}^+ $ $and$ $HCN$
$Bases: {CN^-}$ and $NH_3$
Work Step by Step
${NH_4}^+ $ $and$ $HCN$ are acids because they give ${H^+}$ in the reactions.
And ${CN^-}$ and $NH_3$ are bases because they receive these $H^+$.
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 16 - Acid-Base Equilibria - Exercises - Page 717: 16.17a
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