Aqueous iron(III) chloride and potassium sulfide are mixed

Question

This will be a Net Ionic Equation.

Answer 1

Looking at the complete molecular equation, with phases:

2FeCl₃(aq) + 3K₂S(aq) ==> 6KCl(aq) + Fe₂S₃(s)

Recalling that only aqueous species are dissociated and solid species are not, we can write the ionic equation:

2Fe³⁺(aq) + 6Cl^-(aq) + 6K⁺(aq) + 3S^2-(aq) ==> 6K⁺(aq) + 6Cl^-(aq) + Fe₂S₃(s)

Cancelling spectator ions on each side leaves us with the net ionic equation as follows:

2Fe³⁺(aq) + 3S^2-(aq) ==> Fe₂S₃(s)