File:Annual report (1902) (14783870353).jpg

Identifier: annualreport190200onta (find matches)
Title: Annual report
Year: 1891 (1890s)
Authors: Ontario. Dept. of Mines
Subjects: Mines and mineral resources
Publisher: Toronto
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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Canadian Goldfielrs. Ti:.ri: tifiiud white arsenic, showing coarse and fine crystals. fxi:i
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(:. i) 1901 Arsenic in Ontario 113 (2) Paris green is a chemical compound of copper, arsenious oxide and acetic acid known asaceto-arsenite of copper with the following composition :—Copper arsenite, 82 per cent.; copperacetate, 18 per cent., which may be expressed thus :— Arsenious oxide (As20;3) - 58.64 per cent.Copper oxide (CuO) - - 31.30 Acetic acid - - - 10.06 Total - - - - 100 00 It may be prepared by mixing aqueous solutions of ammonium-copper sulphate andarsenious acid, the bright green precipitate forming only where there is no excess of eitherammonia or acids, as it is soluble in either. Or it may be made by adding sodiumcarbonate to a copper sulphate solution to precipitate about one-fourth of the copper. Thenadd acetic acid till the precipitate of copper is re-dissolved and heat the solution to boiling.Add a solution of sodium arsenite, and the precipitate formed is Paris green, which can beremoved by filtering and drying. The writer has not had an opportunity of exam

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