Answer
a) $HNO_3$ is an acid and $H_2O$ is a base
b) $CH_3COOH$ is an acid and $H_2O$ is a base
c) $NH_3$ is an acid and $H_2O$ is a base
d) $CH_3COO^-$ is an acid and $H_2O$ is a base
Work Step by Step
a) $HNO_3$ is an acid and $H_2O$ is a base
b) $CH_3COOH$ is an acid and $H_2O$ is a base
c) $NH_3$ is an acid and $H_2O$ is a base
d) $CH_3COO^-$ is an acid and $H_2O$ is a base