Write the net ionic equation,including phases, that corresponds to the reaction Cu(NO3)2(aq)+Na2S(aq)----->CuS(s)+2NaNO3(aq)3

Question

ALL numbers in equation are subscripts

Answer 1

Cu(NO₃)₂(aq) + Na₂S(aq) ==> CuS(s) + 2NaNO₃(aq)

Whenever there is a precipitate (s) formed, the net ionic equation will contain the ions that make up that precipitate. In this case, that would be Cu and S making the solid CuS. So, the net ionic equation would be:

Cu²⁺(aq) + S^2-(aq) ==> CuS(s)

Going through the entire process of writing the complete ionic and net ionic equations, it would be:

Cu²⁺(aq) + 2NO^3-(aq) + 2Na⁺(aq) + S^2-(aq) ==> CuS(s) + 2Na⁺(aq) + 2NO₃^-(aq) .. complete ionic

Cu²⁺(aq) + S^2-(aq) ==> CuS(s) .. net ionic (after canceling spectator ions)