Ammonium chloride (NH₄Cl) dissolves in distilled water to form ammonium ions (NH₄⁺) and chloride ions (Cl⁻). This is a dissociation reaction, not a chemical reaction where new substances are formed.

Here's the representation:

NH₄Cl(s) + H₂O(l) → NH₄⁺(aq) + Cl⁻(aq)

* NH₄Cl(s) represents solid ammonium chloride.

* H₂O(l) represents liquid water.

* NH₄⁺(aq) represents ammonium ions dissolved in water (aqueous solution).

* Cl⁻(aq) represents chloride ions dissolved in water (aqueous solution).

Important Note: The reaction is reversible, meaning that ammonium and chloride ions can recombine to form ammonium chloride under certain conditions. However, in a typical solution of ammonium chloride in water, the majority of the salt will be dissociated into ions.