Net ionic equations for potassium sulfate plus calcium phosphate yields

Balanced chemical reaction:

3K₂SO₄ (aq) + Ca₃ (PO₄) ₂ (s) → 2K₃PO₄ (aq) + 3CaSO₄ (s).

Ionic reaction:

6K⁺ (aq) + 3SO₄²⁻ (aq) + Ca₃ (PO₄) ₂ (s) → 6K⁺ (aq) + 2PO₄³⁻ (aq) + 3CaSO₄ (s).

Net ionic reaction: 3SO₄²⁻ (aq) + Ca₃ (PO₄) ₂ (s) → 2PO₄³⁻ (aq) + 3CaSO₄ (s).

aq (aqueous) means dissolved in water.

s (solid) means that salt not dissolved in water.

This chemical reaction is double displacement reaction - cations and anions of the two reactants switch places and form two new compounds.