Reaction of sulphur
Reaction of sulphur with air
Sulphur burns in air to form the gaseous dioxide sulphur(IV) oxide, SO2.
S8(s) + 8O2(g) → 8SO2(g)
Reaction of sulphur with water
Sulphur does not react with water under normal conditions.
Reaction of sulphur with the halogens
Sulphur racts with all the halogens upon heating.
Sulphur reacts with fluorine, F2, and burns to form the hexafluoride sulphur(VI) fluoride.
S8(s) + 24F2(g) → 8SF6(l) [orange]
Molten sulphur reacts with molten sulphur to form disulphur dichloride, S2Cl2. This apparently smells dreadfully. With excess chlorine and in the presence of a catalyst, such as FeCl3, Snl4, etc., it is possible to make a mixture containing an equilibrium mixture of red sulphur(II) chloride, SCl2, and disulphur dichloride, S2Cl2
S8 + 4Cl2 → 4S2Cl2(l) [orange]
S2Cl2(l) + Cl2 2SCl2(l) [dark red]
Reaction of sulphur with acids
Sulphur does not react with dilute non-oxidizing acids.
Reaction of sulphur with bases
Sulphur reacts with hot aqueous potassium hydroxide, KOH, to form sulphide and thiosulphate species.
S8(s) + 6KOH(aq) → 2K2S3 + K2S2O3 + 3H2O(l)
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