Answer
(a)
Acids: $H_2O$ and $CH_3N{H_3}^+$.
Bases: $OH^-$ and $CH_3NH_2$
Conjugate acid-base pairs: $H_2O$ and $OH^-$, $CH_3NH_2$ and $CH_3{NH_3}^+$.
- Water is acting like an acid.
(b)
Acids: $HNO_3$ and $H_3O^+$
Bases: $H_2O$ and ${NO_3}^-$
Conjugate acid-base pairs: $H_2O$ and $H_3O^+$, $HNO_3$ and $N{O_3}^-$
- Water is acting like a base.
Work Step by Step
1. Identify the acids and bases:
- The acids are the species that are donating one $(H^+)$, and the bases are the ones that are receiving.
2. Identify the conjugate acid-base pair:
- These 2 species have one $(H^+)$ as the only difference between the formulas:
For example:
$H_2O$ and $H_3O^+$.
