Ammonium chloride is a salt that dissociates into ammonium and chloride ions when dissolved in water. This process does not involve any chemical change as the chemical composition of the compound remains the same. The ions simply separate and disperse in the water molecules, resulting in a homogeneous mixture.
The reaction can be represented as follows:
NH4Cl (s) → NH4+ (aq) + Cl- (aq)
In this equation, "s" denotes the solid state of ammonium chloride, while "(aq)" indicates the aqueous state of the ions in water.
Since the chemical composition of the substance does not change, this process is considered a physical change.
