Elements of chemistry : including the applications of the science in the arts . mixture of 4 parts of coarse sulphur and 7 of iron \J filings or borings in a covered stoneware or cast-iron crucible. The sulphide of iron, thus obtained, isbroken into lumps, and acted upon by diluted sul-phuric acid in a gas-bottle (fig. 141), exactly as zincis treated in the preparation of hydrogen acid is evolved without the appli-cation of heat, and should be collected over waterat 80° or 90°; or if collected in a gasometer orgasholder, the latter may be filled with brine, inwhich this gas
Elements of chemistry : including the applications of the science in the arts . mixture of 4 parts of coarse sulphur and 7 of iron \J filings or borings in a covered stoneware or cast-iron crucible. The sulphide of iron, thus obtained, isbroken into lumps, and acted upon by diluted sul-phuric acid in a gas-bottle (fig. 141), exactly as zincis treated in the preparation of hydrogen acid is evolved without the appli-cation of heat, and should be collected over waterat 80° or 90°; or if collected in a gasometer orgasholder, the latter may be filled with brine, inwhich this gas is less soluble than in pure gas obtained by this process generally containsfree hydrogen, arising from an intermixture of me-tallic iron with the sulphide of iron used. The gasmay also be evolved from the action of hydrochloricacid upon the sulphide of iron, but as it is then impregnated with the vapour of the. HYDROSULPIIURIC ACID. 307 latter acid, and may also, like every gas produced with effervescence, carry overdrops of fluid, it should always be transmitted through water in a wash-bottle, beforebeing applied to any purpose as pure gas. The reaction by which hydro-sulphuricacid is usually evolved is expressed in the following equation: FeS and and (2.) Hydrosulphuric acid, without any admixture of free hydrogen, is obtainedby digesting in a flask A, used as a retort (fig. 142), with a gentle heat, sulphide Fig. 142.
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisherphila, bookyear1853
