Chapter 3 - Equations, the Mole, and Chemical Formulas - Questions and Exercises - Exercises - Page 131: 3.25

(a) $HClO_{4} (H_{2}O)→H^{+} (aq) + ClO_{4}^{-} (aq)$ (b) $NaNO_{3} (H_{2}O)→Na{+} (aq) + NO_{3}^{-} (aq)$

(a) Perchloric acid dissociates in water to form Hydrogen ions and perchlorate ions. (b) Sodium nitrate dissociates in water to form sodium ions and nitrate ions.