State whether the following statement is true or false:
Acids produce $H_{3}O^{+}$ or $H^{+}(aq)$ ions in water.

(TRUE) The statement is True.
According to the Arrhenius theory of acids,an acid is a substance that dissociates in water to produce hydrogen ions $(H^{+})$. Since $H^{+}$ ions are highly reactive and cannot exist independently in an aqueous solution,they immediately combine with water molecules $(H_{2}O)$ to form hydronium ions $(H_{3}O^{+})$.
Therefore,the reaction is represented as: $HCl + H_{2}O \rightarrow H_{3}O^{+} + Cl^{-}$.
Thus,acids produce $H_{3}O^{+}$ or $H^{+}(aq)$ ions in water.