Write balanced complete ionic and net ionic equations for each reaction. a. K₂SO₄(aq) + CaI₂(aq) → CaSO₄(s) + KI(aq)

Key Concepts

Complete Ionic Equation

A complete ionic equation represents all the ions present in a solution during a chemical reaction. It shows the reactants and products in their ionic forms, highlighting the dissociation of soluble ionic compounds. This equation is essential for understanding how ions interact in solution and sets the stage for identifying the net ionic equation.

Net Ionic Equation

The net ionic equation simplifies the complete ionic equation by removing spectator ions—ions that do not participate in the actual chemical reaction. It focuses solely on the ions and molecules that undergo a change, providing a clearer picture of the chemical process. This equation is crucial for understanding the essence of the reaction and the formation of precipitates or other products.

Precipitation Reaction

A precipitation reaction occurs when two aqueous solutions react to form an insoluble solid, known as a precipitate. In the context of the given reaction, calcium sulfate (CaSO4) precipitates out of the solution. Recognizing the conditions under which a precipitate forms is vital for writing accurate ionic equations and understanding the overall reaction dynamics.