Hydrogen sulphide generator

Method of Obtaining Heat—Bottles—A Chemical Balance—Test Tube Racks—A Ring Stand—A Hydrogen Sulphide Generator — Necessary Apparatus — Test Tubes — Evaporating Dishes—Fire Clay Crucibles—Filter Paper—Graduated Cylinder—Chemical Thermometers—Pipette—Red and Blue Litmus Paper—Beakers—Pinch Cocks—Thistle Tubes—Flasks— Clamps—Chemicals for the Laboratory. Pages 40-62... 

A hydrogen sulphide generator is quite necessary for the small laboratory as this gas is used in many different ways. Hydrogen sulphide is generated when hydrochloric acid comes in contact with iron sulphide. These two compounds are used for the production of... 

Removal of sulphides from leather industry waste Generation of sulphide gas Hydrogen sulphide... 

Kumar and Agarwal (1983) modified wood with thioacetic acid in the vapour phase, which results in hydrogen sulphide being generated as the by-product. The decay and termite resistance of the wood was determined. The thioacetic acid modified wood exhibited... 

Thiosalts and Sulphides of Molybdenum and Tungsten. Pour 2-3 ml of an ammonium molybdate solution into one test tube and 2-3 ml of a sodium tungstate solution into another one. Add 2-3 drops of a 25 % ammonia solution to each solution and pass a stream of hydrogen sulphide through them from a Kipp gas generator. What compounds form Acidify the solutions with a 10% hydrochloric... 

Note. — This preparation serves for the generation of arsenic-free hydrogen sulphide. The hydrochloric acid used for this purpose should also be tested for arsenic. 

This very poisonous gas should only be prepared and used in an efficient fume cupboard. It is usually generated from iron(n) sulphide and dilute hydrochloric acid (1 3) in a Kipp s apparatus it should be washed with water to remove acid spray. The resulting hydrogen sulphide contains hydrogen because of the presence of free iron in commercial iron(n) sulphide. 

Thiols can be prepared by the action of alkyl halides with an excess of KOH and hydrogen sulphide. It is an SN2 reaction and involves the generation of a hydrogen sulphide anion (HS ) as nucleophile. In this reaction, there is the possibility of the product being ionised and reacting with a second molecule of alkyl halide to produce a thioether (RSR) as a by-product. An excess of hydrogen sulphide is normally used to avoid this problem. 

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