For the sulphate of copper solution, take 16.5 parts by weight of pure crystals of copper sulphate (CuSO 4 50H 2) and dissolve in 83.5 parts by weight of water; the resulting solution should have a specific gravity of 1.
A cuproso-cupric sulphite, Cu2S03, CuSO 3, 2H 2 0, is obtained by mixing solutions of cupric sulphate and acid sodium sulphite.
Cupric sulphate or " Blue Vitriol," CuSO 4, is one of the most important salts of copper.
It occurs in cupriferous mine waters and as the minerals chalcanthite or cyanosite, CuSO 4.5H 2 O, and boothite, CuSO 4.7H 2 O.
Van Deventer, ibid., 1906, 3, p. 515.) It crystallizes with five molecules of water as large blue triclinic prisms. When heated to Poo°, it loses four molecules of water and forms the bluish-white monohydrate, which, on further heating to 250°-260°, is converted into the white CuSO 4.
Several basic salts are known, some of which occur as minerals; of these, we may mention brochantite, CuS04, 3Cu (OH 2), langite, CuSO 4, 3Cu(OH) 2, H 2 O, lyellite (or devilline), warringtonite; woodwardite and enysite are hydrated copperaluminium sulphates, connellite is a basic copper chlorosulphate, and spangolite is a basic copper aluminium chlorosulphate.