copper sulfate

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copper sulfate,

common name for the blue crystalline heptahydrate of cupric sulfatecupric sulfate
or copper (II) sulfate,
chemical compound, CuSO4, taking the form of white rhombohedral crystals or amorphous powder. It decomposes at 650°C; to cupric oxide (CuO).
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, in which copper has valence +2. It may also refer to cuprous sulfate (Cu2SO4), in which copper has valence +1.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Copper Sulfate


(cupric sulfate), CuSO4; colorless crystals with a density of 3.64 g/cm3. Copper sulfate decomposes upon heating (CuSO4 = CuO + SO2 + ½O2); it is readily soluble in water (23.05 g CuSO4 per 100 g H2O at 25°C). The bright blue pentahydrate CuSO4 · 5H2O is crystallized from aqueous copper sulfate solutions. Upon heating above 105°C, it converts to CuSO4- 3H2O (light blue color); it loses all water at 258°C. The pentahydrate occurs in nature as the mineral chalcanthite, CuSO4 · 5H2O.

The pentahydrate is prepared commercially by dissolving copper in heated, dilute sulfuric acid in the presence of blown air, or it can be obtained as a by-product of electrolytic copper refining. It is used in leather tanning, in the manufacture of mineral paints, and in agriculture to destroy plant pests, to control plant diseases, and in seed treatment; it is also used in galvanic cells.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

copper sulfate

[′käp·ər ′səl‚fāt]
(inorganic chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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