The chemical equation for the reaction between barium chloride (BaCl₂) and copper sulfate (CuSO₄) is:

BaCl₂ (aq) + CuSO₄ (aq) → BaSO₄ (s) + CuCl₂ (aq)

Here's a breakdown:

* BaCl₂ (aq): Barium chloride is dissolved in water (aqueous solution).

* CuSO₄ (aq): Copper sulfate is also dissolved in water.

* BaSO₄ (s): Barium sulfate is a white, insoluble solid that precipitates out of the solution.

* CuCl₂ (aq): Copper chloride remains dissolved in water.

Explanation:

This is a double displacement reaction where the positive and negative ions of the reactants switch partners. The barium ions (Ba²⁺) from barium chloride combine with the sulfate ions (SO₄²⁻) from copper sulfate to form the insoluble barium sulfate. The copper ions (Cu²⁺) from copper sulfate then combine with the chloride ions (Cl⁻) from barium chloride to form copper chloride, which stays dissolved in the solution.

Key Points:

* This reaction is used to demonstrate the formation of a precipitate (a solid formed in a solution).

* Barium sulfate is used in medical imaging (barium meal).

* Copper chloride is used in various industrial applications.