Question

An aqueous solution of release ${\text{H}}^{+}$ ions.

• A. acids
• B. bases
• C. alkalis

Answer 1

The correct option is A acids

Acids release ${\text{H}}^{+}$ ions and bases release ${\text{OH}}^{-}$ ions when dissolved in water.
${\text{H}}^{+}$ ions released by acids combine with water to form hydronium ions $\left({\text{H}}_3{\text{O}}^{+}\right)$.
So the ionisation reaction for an acid $\text{HA}$ in water is written as follows:
$\text{HA(aq)}+{\text{H}}_2\text{O (l)}\rightleftharpoons {\text{H}}_3{\text{O}}^{+}\text{(aq)}+{\text{A}}^{-}\text{(aq)}$