Identify the spectator ions in the complete ionic equation.
Ba2+(aq)+ 2 I−(aq)+ 2Na+(aq)+SO42−(aq) → BaSO4(s) + 2 I−(aq) + 2 Na+(aq)
A spectator ion is an ion that exists in the same form on both the reactant and product sides of a chemical reaction. The ion is unchanged on both sides of a chemical equation and does not affect equilibrium.
The spectator ions are - I- ion and Na+ ions.