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Atomistry » Nickel » Compounds | ||
Atomistry » Nickel » Compounds » Nickel Fluoride » Nickel Dichloride » Double Nickel Chlorides » Nickel Dibromide » Nickel Di-iodide » Nickel Chlorate » Nickel Perchlorate » Nickel Bromate » Nickel Iodate » Tri-nickel Suboxide » Nickel Suboxide » Nickel Monoxide » Nickel Dihydroxide » Nickelo-nickelic Oxide » Nickel Dioxide » Nickel Subsulphide » Nickel Monosulphide » Nickel Sesquisulphide » Tri-nickel Tetrasulphide » Nickel Disulphide » Nickel Tetrasulphide » Nickel Sulphite » Nickel Thiosulphate » Nickel Dithionate » Nickel Sulphate » Nickel Subselenide » Nickel Selenide » Nickel Sesquiselenide » Nickel Selenite » Nickel Sesquitelluride » Nickel Tellurite » Nickel Chromate » Nickel Dichromate » Double Nickel Chromates » Nickel Molybdate » Nickel Nitride » Nickel Azoimide » Nickelamide » Nitro-nickel » Nickel Nitrite » Nickel Nitrate » Di-nickel Phosphide » Nickel Sesquiphosphide » Nickel Diphosphide » Nickel Triphosphide » Nickel Hypophosphite » Nickel Phosphite » Nickel Metaphosphate » Nickel Orthophosphate » Nickel Pyrophosphate » Nickel Thio-orthophosphate » Nickel Thiopyrophosphite » Nickel Thiopyrophosphate » Tri-nickel Diarsenide » Nickel Arsenide » Nickel Diarsenide » Nickel Arsenite » Nickel Orthoarsenate » Nickel Antimonide » Nickel Antimonate » Nickel Thioantimonite » Nickel Vanadate » Nickel Carbide » Nickel Tetracarbonyl » Nickel Carbonate » Nickel Monocyanide » Nickel Cyanide » Nickel Thiocyanate » Nickel Thiocarbonate Hexammoniate » Nickel Subsilicide » Nickel Orthosilicate » Nickel Monoboride » Nickel Borates » |
Compounds of Nickel
General Properties of Compounds of Nickel - Nickel usually behaves as a divalent element. Its salts when anhydrous are yellow in colour. They can usually be obtained in various stages of hydration, in which condition they are usually green, and frequently yield series of double salts, analogous in physical properties and in chemical constitution to many double salts obtainable with divalent iron. Like copper salts, those of nickel readily unite with ammonia. Like ferrous salts they absorb nitric oxide, but without change of colour.
Evidence has been obtained of the existence of highly unstable salts of trivalent nickel, but it has not been found possible to isolate them from their solutions. Nickel salts are antiseptic; they arrest fermentation and the growth of plants. The carbonyl is intensely poisonous. Preparation of Nickel Salts free from Cobalt
As has already been mentioned, nickel closely resembles cobalt in many of its properties, and for many purposes it is quite unnecessary to effect a complete separation of the metals. When, however, pure salts of either metal are required, several convenient methods are to hand for effecting the removal of the unwanted element. In order to remove small quantities of cobalt from nickel salts any of the methods suggested for the removal of nickel from cobalt salts may be utilised. Of these, Fischer's nitrite process is specially convenient.
Another method consists in adding ammonia to the impure bromide in aqueous solution, whereby nickel bromide hexammoniate, NiBr2.6NH3, separates out in beautiful violet crystals. Since cobalt does not yield a similar derivative under like conditions, a very pure salt of nickel may be obtained in this way. The hexammoniate of nickel chloride, namely, NiCl2.6NH3, may similarly be used. |
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