. Transactions of the American Philosophical Society. the compound consisted of silver sulphide, with a small quantity of silverthrown down by the carbon monoxide present in the gas. Yellow mercuric oxide forms an excellent means of separation of the two gases,and, after the removal of the hydrogen sulphide by this Ieagent used in a dry state,the production of a precipitate in ammonlacal cadmium chloride solution would indi-cate that this cadmium sulphide has been caused by carbon oxysulphide. The presence of a little carbon monoxide in the CSO made from KCl^S andsulphuric acid is liable to mi
. Transactions of the American Philosophical Society. the compound consisted of silver sulphide, with a small quantity of silverthrown down by the carbon monoxide present in the gas. Yellow mercuric oxide forms an excellent means of separation of the two gases,and, after the removal of the hydrogen sulphide by this Ieagent used in a dry state,the production of a precipitate in ammonlacal cadmium chloride solution would indi-cate that this cadmium sulphide has been caused by carbon oxysulphide. The presence of a little carbon monoxide in the CSO made from KCl^S andsulphuric acid is liable to mislead in the reaction towards palladium chloride, causinga black precipitate of palladium resembling the sulphide. METHYL HTDROSULPHIDE, (CHo) SH. This gas may be produced by several typical reactions: (1) When methyl chloride (bromide or iodide) i§ heated with KSH in alcoholicsolution, the reaction being CH3CI + KSH = KCl + CH3SH. Methyl chloride gas was conducted into a boiling alcoholic solution of KSHcontained in a tube of the shape here The long limb of the tube (length, thirty inches) was connected with a reversed 200 RESEARCHES UPON THE CHEMICAL PROPERTIES OF GASES. condenser and was heated over a small flame. The gas as it escaped was passedthrough a long glass tube containing cotton coated with red oxide of mercury,which absorbs any possible traces of hydrogen sulphide and some of the gas was passed through broken ice. As the reaction above mentioned is ratherincomplete, the gas contains much unaltered methyl chloride. The same is truewhen the bromide and iodide are used. Methyl chloride is the best suited to thepurpose, since it may be conducted into the liquid as a gas. The iodide, being avery volatile liquid, is not easily added without danger of tumultuous of diflBcultly soluble potassium chloride or iodide causes clogging andgreatly interferes with the process, even when large delivery tubes are used. (2) Methyl sodium sulp
Size: 2538px × 985px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorj, bookidtransactionsofa171893amer, booksubjectscience
