Answer:
Yes. Ca²⁺(aq) + SO₄²⁻(aq) ⟶ CaSO₄(s)
Step-by-step explanation:
The possible reaction is
CaI₂ + Na₂SO₄ ⟶ CaSO₄ + 2NaI
To predict a reaction, you must know <em>the solubility rules</em>.
The important ones for this question are
- Salts containing Na⁺ are <em>soluble</em>. Thus, NaI is soluble.
- Most sulfates are soluble, but CaSO₄ is not. Thus, CaSO₄ is a precipitate, and a reaction occurs.
Molecular equation
CaI₂(aq) + Na₂SO₄(aq) ⟶ CaSO₄(s) + 2NaI(aq)
Ionic equation
Ca²⁺(aq) + <u>2I⁻(aq)</u> + 2Na²⁺(aq) + SO₄²⁻(aq) ⟶ CaSO₄(s) + 2Na⁺(aq) + 2I⁻(aq)
Net ionic equation
Cancel all ions that appear on both sides of the reaction arrow (underlined).
Ca²⁺(aq) + <u>2I⁻(aq) </u>+ <u>2Na²⁺(aq)</u> + SO₄²⁻(aq) ⟶ CaSO₄(s) + <u>2Na⁺(aq)</u> + <u>2I⁻(aq)
</u>
The net ionic equation is
Ca²⁺(aq) + SO₄²⁻(aq) ⟶ CaSO₄(s)
