1. Correcting the Formula:

The chemical formula you provided seems to be missing some elements. A more accurate representation of the reaction would be:

H₂SO₄ (aq) + Ca²⁺ (aq) + 2I⁻ (aq) → CaSO₄ (s) + 2H⁺ (aq) + 2I⁻ (aq)

2. Identifying the Spectator Ions:

* Spectator ions are ions that are present in the reaction but don't participate in the actual chemical change. They appear on both sides of the equation, unchanged.

* In this reaction:

* I⁻ (iodide ions) are spectator ions. They are present as reactants and products, unchanged.

* H⁺ (hydrogen ions) are spectator ions. They are present as reactants and products, unchanged.

3. The Net Ionic Equation:

To show the actual chemical change, we can write the net ionic equation, which removes the spectator ions:

Ca²⁺ (aq) + SO₄²⁻ (aq) → CaSO₄ (s)

Therefore, the spectator ions in the reaction are I⁻ and H⁺.