Write a chemical equation for HCl (aq) showing how it is an acid or a base according to the Arrhenius definition. Express your answer as a chemical equation. Identify all of the phases in your answer.

HCl (l) + H₂O (l) → H₃O⁺ (aq) + Cl⁻ (aq)

Explanation:

Arrhenius' acid-base concept indicates that a substance will be an acid when it produces in water hydrogen H⁺ ions or hydronium H₃O⁺ ions.

In turn, the substance will be base if when reacting in water it produces hydroxide ions (OH⁻)

The HCl reacts in water in order to produce hydronium ions and chlorides