## General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

a. $H_3PO_4/H_2P{O_4}^-$ and $H_3O^+/H_2O$ b. $H_2O/OH^-$ and $HCO{_3}^-/CO{_3}^{2-}$ c. $H_3PO_4/H_2P{O_4}^-$ and $NH{_4}^+/NH_3$ d. $HNO_2/NO{_2}^-$ and $CH_3CH_2NH{_3}^+/CH_3CH_2NH_2$
1. Identify the reactant that acts as an acid, and what it turns after donating a proton. a. $H_3PO_4 \longrightarrow H_2P{O_4}^-$ b. $H_2O \longrightarrow OH^-$ c. $H_3PO_4 \longrightarrow H_2P{O_4}^-$ d. $HNO_2 \longrightarrow N{O_2}^-$ - These are the first acid-base pairs. 2. Identify the reactant that act as a base, and its conjugate acid. a. $H_2O \longrightarrow H_3O^+$ b. $C{O_3}^{2-} \longrightarrow HC{O_3}^-$ c. $NH_3 \longrightarrow N{H_4}^+$ d. $CH_3CH_2NH_2 \longrightarrow CH_3CH_2N{H_3}^{+}$