Final answer:
The complete ionic equation for the reaction between lead perchlorate and sodium sulfide is Pb²⁺ + S²⁻ → PbS.
Step-by-step explanation:
The balanced chemical equation for the reaction between lead perchlorate (Pb(ClO4)2) and sodium sulfide (Na2S) is:
Pb(ClO4)2 + Na2S → PbS + NaClO4
The complete ionic equation for this reaction can be written by separating all the ions present in the reactants:
Pb²⁺ + 2ClO₄⁻ + 2Na⁺ + S²⁻ → PbS + 2Na⁺ + 2ClO₄⁻
The net ionic equation is obtained by removing any spectator ions, which are the ions that appear on both sides of the equation and do not take part in the reaction:
Pb²⁺ + S²⁻ → PbS