Hydrogen sulphide (H2S) Colorless gas with a smell like rotten eggs. Hydrogen sulphide is heavier than air. This gas is soluble in cold water but insoluble in hot water.
Hydrogen sulphide contains Hydrogen and Sulphur. Following are some experiments to prove that.
Prove that Hydrogen sulphide contains Hydrogen and Sulphur
Presence of Hydrogen in Hydrogen Sulphide
Experiment: A little tin placed in hydrogen sulphide and heated produces a solid and colourless and odourless gas. This gas burns in the air with a blue flame to produce a colourless liquid. This liquid turns the white powder of anhydrous copper sulfate blue. So, that liquid is water. Combustion of hydrogen produces water and this hydrogen comes from hydrogen sulphide. Hence, it is proved that hydrogen sulphide contains hydrogen.
H2S+Sn = SnS + H2
2H2 + O2 = 2H2O
Presence of Sulfur in Hydrogen Sulphide
Experiment: When a burning wick is introduced into a gas jar full of hydrogen sulphide, the wick will extinguish, but the gas burns with a blue flame. As a result of combustion, yellow solids accumulate on the inside of the gas jar. Combustion of that solid in the air produces a suffocating gas with a burning sulfur smell. This gas is sulfur dioxide (SO2). So, the powdery substance is sulphur. That is, hydrogen sulfide contains sulfur.
2H2S + O2 = S + 2H2O S + O2 = SO2 ↑