Wells's principles and applications of chemistry; . rpose an evolution flask (Fig. 130) is best adapted; but a common, open-mouthed bottle, fitted with a perforated cork and bent tube, will answer. (See Fig. 131.) Introduce into the flask protosulphide of iron in small quantities, with water sufficient to cover it; then add sulphuric acid until a -copious disengagement of gas takes place. By introducing the evolu-tion tube iato cold water, a solution of the gas will be obtained, in which state its properties may be ex-perimentally illustrated to the best advantage. The operation of prepaiing t
Wells's principles and applications of chemistry; . rpose an evolution flask (Fig. 130) is best adapted; but a common, open-mouthed bottle, fitted with a perforated cork and bent tube, will answer. (See Fig. 131.) Introduce into the flask protosulphide of iron in small quantities, with water sufficient to cover it; then add sulphuric acid until a -copious disengagement of gas takes place. By introducing the evolu-tion tube iato cold water, a solution of the gas will be obtained, in which state its properties may be ex-perimentally illustrated to the best advantage. The operation of prepaiing thegas should be conducted in a well-ventilated apartment, or in the open air. The chemical reaction involved in this operation is as follows: water is de-composed; its oxygen uniting with the iron to form oxyd of iron, whichdissolves in the acid to form sulphate of iron, while the hydrogen escapes, andtakes with it the sulphur contained in the sulphide of iron. Thus:— Sulphide of iron. SuIpLuric acid (dilute). Sulphate of iron. Hydrosclph. Fig. 131.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectchemistry, bookyear18
