Identify the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed. A) Li⁺(aq) + SO₄^2-(aq) + Cu⁺(aq) + NO₃^-(aq) → CuS(s) + Li⁺(aq) + NO₃^-(aq) B) Li⁺(aq) + S^-(aq) + Cu⁺(aq) + NO₃^-(aq) → CuS(s) + LiNO₃(aq) C) 2Li⁺(aq) + S^2-(aq) + Cu²⁺(aq) + 2NO₃^-(aq) → Cu²⁺(aq) + S^2-(aq) + 2LiNO₃(s) D) 2Li⁺(aq) + S^2-(aq) + Cu²⁺(aq) + 2NO₃^-(aq) → CuS(s) + 2Li⁺(aq) + 2NO₃^-(aq) E) No reaction occurs.

Question

Quizplus · Accepted Answer

The correct ionic equation is:

2LiS + Cu(NO3)2 → CuS + 2LiNO3

This can be separated into its respective ions as:

2Li+ + 2S2- + Cu2+ + 2NO3- → CuS + 2Li+ + 2NO3-

Canceling out the spectator ions (Li+ and NO3-), we get:

2S2- + Cu2+ → CuS

This reaction produces a precipitate of copper(II) sulfide (CuS) and is represented by the ionic equation above. Choice D correctly represents the reaction and the formation of the precipitate.

Identify the Complete Ionic Equation for the Reaction (If Any)