cupric sulfate


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cupric sulfate

(ko͞o`prĭk sŭl`fāt, kyo͞o`–) 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). It is fairly soluble in water and when dissolved forms the pentahydrate, CuSO4·5H2O, the form that is most familiar. The pentahydrate can be collected as blue triclinic crystals; it is also known as blue vitriol. It loses part of its water of crystallization when heated to 110°C; and fully dehydrates at 150°C;. Cupric sulfate is used in copperplating, in dyeing (as a mordant), in wet-cell batteries, in pigments, and in insecticides, fungicides, and algicides. It is insoluble in alkali solutions, a property used in the preparation of Bordeaux mixture; lime (calcium hydroxide) is added to moist cupric sulfate, forming a basic cupric sulfate precipitate (a mixture of cupric sulfate and cupric hydroxide). The anhydrous sulfate is used to detect the presence of water in certain organic liquids; it turns into the blue pentahydrate, e.g., when added to alcohol that contains water. Cupric sulfate is prepared by the action of warm dilute sulfuric acidsulfuric acid,
chemical compound, H2SO4, colorless, odorless, extremely corrosive, oily liquid. It is sometimes called oil of vitriol. Concentrated Sulfuric Acid

When heated, the pure 100% acid loses sulfur trioxide gas, SO3
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 (oil of vitriol) on coppercopper,
metallic chemical element; symbol Cu [Lat. cuprum=copper]; at. no. 29; at. wt. 63.546; m.p. 1,083.4°C;; b.p. 2,567°C;; sp. gr. 8.96 at 20°C;; valence +1 or +2. Copper and some of its alloys have been used by humanity since the Bronze Age.
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 metal or cupric oxide; it is also a byproduct of copper sulfide ore refining. It occurs naturally in the minerals chalcanthite (the pentahydrate), hydrocyanite (the anhydrous sulfate), and brochantite (a basic sulfate, CuSO4·3Cu(OH)2).

cupric sulfate

[′kyü·prik ′səl‚fāt]
(inorganic chemistry)
CuSO4 A water-soluble salt used in copper-plating baths; crystallizes as hydrous copper sulfate, which is blue. Also known as copper sulfate.
References in periodicals archive ?
Other salts, such as cupric sulfate and phosphate salts ([Na.sub.2]HP[O.sub.4], K[H.sub.2]P[O.sub.4]), were added as promoters.
A 250/[micro]L portion of each sample was mixed with 1 mL of Biuret reagent (1.5 g/L cupric sulfate, 6.0 g/L sodium potassium tartrate, and 30.0 g/L sodium hydroxide), mixed by inversion, and allowed to stand for 30 min at room temperature.
Baker and Ammerman (1995) reported that the relative bioavailability estimates of organic Cu sources ranged between 88% and 147% of the response to cupric sulfate in poultry, swine, sheep, and cattle.
Recently NIST researchers have demonstrated superconformal electrodeposition of copper in 500 nm deep trenches ranging from 500 nm to 90 nm in width using an acid cupric sulfate electrolyte containing chloride (Cl), polyethylene glycol (PEG), and 3-mercapto-1-propanesulfonate (MPSA).
Peak response of DHA in the solution was compared with that of DHA obtained from a standard solution of ascorbic acid after oxidation in 0.1 mol/L acetate buffer containing 10 mmol/L cupric sulfate for 1 h at room temperature.