Question

Ionic equation: Zn(NO3)2 (aq)+ K2S (aq) ------> ZnS (s) + 2KNO3 (aq)

Answer 1

Potassium nitrate does not have a net ionic equation. It is because potassium nitrate is not soluble and does not produce precipitates. The net ionic reaction is going to be Zn2+ + S2- -> ZnS(s). Zinc sulfide precipitates in the net ionic reaction.

Answer 2

Answer: $\Zn^{2+}+2S^{2-}rightarrow ZnS$

Explanation:

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The given chemical equation is:

$Zn(NO_3)_2(aq)+K_2S(aq)\rightarrow ZnS(s)+2KNO_3(aq)$

The ions which are present on both the sides of the equation are potassium and nitrate ions and hence are not involved in net ionic equation.

$Zn^{2+}+2NO_3^-+2K^++S^{2-}\rightarrow ZnS+2K^++NO_3^-$

Hence, the net ionic equation is $\Zn^{2+}+2S^{2-}rightarrow ZnS$