Iron (II) sulfide is a chemical compound with the formula FeS. In practice, iron sulfides are often non-stoichiometric. Powdered iron sulfide is pyrophoric.
FeS Ferrous Sulfide or Iron Sulphide can be obtained by reacting iron and sulfur.
S8 (s) + 8Fe(s) → 8FeS(s)
Certain chemical principles are nicely illustrated using the chemistry of iron sulfides. The methods of chemical composition can be shown by the production of iron.
This reaction is exothermic as more energy is given out than taken in.
Iron shows ferromagnetism; iron sulfides do not.