When copper nitrate (Cu(NO₃)₂) and barium chloride (BaCl₂) react, they form a precipitate of barium nitrate (Ba(NO₃)₂) and copper chloride (CuCl₂) remains in solution.

Here's the balanced chemical equation for the reaction:

Cu(NO₃)₂ (aq) + BaCl₂ (aq) → Ba(NO₃)₂ (s) + CuCl₂ (aq)

Explanation:

* Double Displacement Reaction: This is a double displacement reaction, where the cations and anions of the reactants switch places.

* Solubility Rules: Barium nitrate (Ba(NO₃)₂) is insoluble in water according to solubility rules, which is why it forms a precipitate (solid that settles out of solution).

* Copper Chloride: Copper chloride (CuCl₂) is soluble in water and remains in solution.

Key points:

* The precipitate is white barium nitrate (Ba(NO₃)₂).

* The reaction is an example of a precipitation reaction.

* The solubility rules are crucial in determining which product forms the precipitate.