Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed.

S²⁻(aq) + Cu²⁺(aq) ⇒ CuS(s)

Explanation:

Let's consider the molecular equation that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed.

Li₂S(aq) + Cu(NO₃)₂(aq) ⇒ 2 LiNO₃(aq) + CuS(s)

The complete ionic equation includes all the ions and the species that do not dissociate in water.

2 Li⁺(aq) + S²⁻(aq) + Cu²⁺(aq) + 2 NO₃⁻(aq) ⇒ 2 Li⁺(aq) + 2 NO₃⁻(aq) + CuS(s)

The net ionic equation includes only the ions that participate in the reaction and the species that do not dissociate in water.

S²⁻(aq) + Cu²⁺(aq) ⇒ CuS(s)