Spectator Ion

Definition

Spectator ions are ions that exist in the same form on both the reactant and product sides of a chemical equation. They do not participate directly in the reaction.

Related terms

Precipitation Reaction:

A reaction where an insoluble solid (precipitate) forms from two aqueous solutions.

Net Ionic Equation:

An equation showing only those particles involved directly with the chemical change, not including spectator ions.

Salt Bridge:

It's part of an electrochemical cell which allows ion flow without extensive mixing of different solutions.