Final answer:
The spectator ions in the given reaction are Ca²+ and CO₃²-. They do not undergo any chemical change in the reaction. The net ionic equation is 2Na+(aq) + 2Cl-(aq) → 2Na+(aq) + 2Cl-(aq).
Step-by-step explanation:
In the given reaction, CaCl₂(aq) + Na₂CO₃(aq) → CaCO₃(s) + 2NaCl(aq), the spectator ions are Ca²+ and CO₃²-. Spectator ions are ions that are present in the reaction but do not undergo any chemical change. They are found on both sides of the equation. In this case, the calcium ion (Ca²+) and the carbonate ion (CO₃²-) are spectators. Therefore, the net ionic equation would be 2Na+(aq) + 2Cl-(aq) → 2Na+(aq) + 2Cl-(aq). The spectator ions have been removed from both sides of the equation.