In a laboratory, when sulphide is treated with some standard acids it results in the formation of a weak acid known as H2S along with other salts and metals. H2S chemical name is hydrogen sulphide, a gas that is commonly found in the drilling and production of crude oil and natural gas. It is also found in wastewater treatment facilities and sewers. Its presence can be detected with its strong rotten egg smell. Moreover, the gas is colourless, highly flammable, corrosive, and toxic in nature.  The standard laboratory preparation of hydrogen sulphide formula involves the use of ferrous sulphide to produce H2S:\\[FeS + 2 HCl \\rightarrow FeCl_{2} + H_{2}S \\]Thioacetamide is also used to generate H2S in quantitative inorganic analysis. \\[CH_{3}(S)NH_{2} + H_{2}O \\rightarrow CH_{3} C(O)NH_{2} + H_{2}S\\]