H₂O(l) ⇌ H⁺(aq) + OH⁻(aq)

This equation represents the following:

* H₂O(l): Liquid water molecules.

* ⇌: This symbol indicates that the reaction is reversible, meaning it can proceed in both directions.

* H⁺(aq): Hydrogen ions (protons) in aqueous solution.

* OH⁻(aq): Hydroxide ions in aqueous solution.

Explanation:

Water molecules can dissociate into hydrogen ions (H⁺) and hydroxide ions (OH⁻). This dissociation occurs to a very small extent, meaning that only a tiny fraction of water molecules are ionized at any given time. The dissociation is an equilibrium process, meaning that the forward and reverse reactions occur at equal rates.

Important Note:

* The dissociation of water is an important factor in determining its pH. Pure water has a pH of 7, which is neutral.

* The presence of acids or bases can shift the equilibrium of the dissociation reaction, resulting in a change in the pH of the solution.

* The dissociation constant for water (Kw) is a measure of the extent of its dissociation. At 25°C, Kw is 1.0 × 10⁻¹⁴.