Final answer:
The ions that will appear in the total ionic equation for the given reaction are Ba²⁺, CO₃²⁺, H⁺, and SO₄²⁺ (option d).
Step-by-step explanation:
The student is asking which ions will appear in the total ionic equation for a given chemical reaction. The correct answer is d. Ba²⁺, CO₃²⁺, H⁺, and SO₄²⁺. These ions are all involved in the reaction before the formation of the precipitate and the other products. In a total ionic equation, all aqueous species are represented as ions. Barium sulfate (BaSO₄) is insoluble in water, so it will precipitate out of the solution, leaving behind the spectator ions.
The net ionic equation, which excludes spectator ions, for the precipitation of BaSO₄ from the given reactants can be represented as:
Ba²⁺ (aq) + SO₄²⁺ (aq) → BaSO₄ (s)
This equation shows the formation of barium sulfate precipitate from barium and sulfate ions.