Final answer:
The net ionic equation for the reaction between K2S and Fe(NO₃)2 is Fe²+(aq) + S²-(aq) → FeS(s).
Step-by-step explanation:
The net ionic equation for the reaction between K2S and Fe(NO₃)2 can be determined by writing the balanced chemical equation first:
K2S(aq) + 2Fe(NO₃)2(aq) → 2KNO₃(aq) + FeS(s)
The next step is to separate the ions that are present in the equation and remove the spectator ions. In this case, the spectator ions are the K+ and NO₃- ions, which are present on both sides of the equation. So, the net ionic equation is:
Fe²+(aq) + S²-(aq) → FeS(s)