Thiocyanate
Formula for calcium nitride: Ca3N2
The reaction between potassium thiocyanate and ferric chloride forms a blood-red complex called ferric thiocyanate. This complex is formed due to the reaction between the thiocyanate ions from potassium thiocyanate and the iron(III) ions from ferric chloride. The balanced chemical equation for the reaction is: FeCl3 + 3 KSCN -> Fe(SCN)3 + 3 KCl.