Nickel chloride hexahydrate

Nickel chloride hexahydrate [7791-20-0] is formed by the reaction of nickel powder or nickel oxide with a hot mixture of water and HCl. Nickel duoride [13940-83-5], 4H2O, is prepared by the reaction of hydroduoric acid on nickel carbonate. Nickel bromide [18721 -96-5], NiBr2 6H20, is made... 

The most common plafing bath uses fluoride to complex the fin. A typical solution contains 45 g/L staimous chloride, 300 g/L nickel chloride hexahydrate, and 55 g/L ammonium bifluofide. It is operated at pH 2.0—2.5 usiag ammonium hydroxide temperature is 65—75°C and current about 200 A/m. The bath has excellent throwing power. Air agitation is avoided. The deposit is bright without additives. Anodes are cast nickel, and the fin is replenished by additions of staimous chloride. AHoy anodes of 72% fin have been used to a much lesser extent. Tia-nickel deposits are covered by ASTM (136) and ISO (137) specifications. One other bath based on pyrophosphate has appeared ia the Hterature, but does not seem to be ia commercial use. 

Embryos age 4 or 8 days white leghorn strain injected into yolk or onto the chorioallantoic membrane 3.6 mg Ni/kg FW embryo (0.2 mg nickel as nickel chloride hexahydrate/egg) LD50 (18 days postinjection) no developmental abnormalities in survivors 8 ... 

Scenario A student reacted green nickel chloride hexahydrate (NiCl2 6 H20) with NH3. A solid bluish purple solid was produced ... 

Nickel catalysts, 77 94, 99, 109 precipitated, 77 121-122 Nickel-catalyzed dinitrotoluene hydrogenation, 25 194 Nickel chelates, 77 117 Nickel chloride hexahydrate, 77 109, 110 Nickel chromate, molecular formula, properties, and uses, 6 562t Nickel-chromium alloy 600, in galvanic series, 7 805t... 

How would you prepare 250.0 mL of a 50.0 ppm solution of nickel from pure solid nickel chloride hexahydrate, NiCl2- 6 H20, FW = 237.71 g/mol ... 

Nickel acetylacetonate is prepared by the reaction of acetylacetone with nickel chloride hexahydrate or nickel hydroxide, followed by crystaUization ... 

When ammonia gas is passed over anhydrous nickel chloride the product is an ammoniate, hexamine nickel chloride, NiCb GNHs. Ammoniate also can be prepared in solution by dissolving nickel chloride hexahydrate in an aqueous solution of ammonia. 

Nickel chloride hexahydrate was obtained from the Fisher Scientific Company. 

Urushibara Co catalysts can be prepared exactly in the same way as the corresponding Ni catalysts, using cobalt chloride hexahydrate instead of nickel chloride hexahydrate as starting material. Similarly as with Raney catalysts, Urushibara Co has been found to be more effective and selective than Urushibara Ni in the hydrogenation of nitriles, affording high yields of primary amines.105,106... 

Standard Nickel Solution Transfer 40.1 mg of nickel chloride hexahydrate, accurately weighed, into a 1-L volumetric... 

Nickel chloride (0 5m). Dissolve 119 g nickel chloride hexahydrate, NiCl2.6H20, in water and dilute to 1 litre. 

Preparation. The reagent is prepared in 84% yield by the reaction of nickel chloride hexahydrate with triphenylphosphine in glacial acetic acid. 

Nickel phthalocyanine is conveniently prepared by heating etched nickel foil in o-cyanobenzamide at 270°C (10). An alternative preparation involves phthahc anhydride, urea, nickel chloride hexahydrate, and ammonium molybdate in trichlorobenzene at 200°C (81). It is stable to concentrated sulfuric acid, sublimes readily, and shows no tendency to form six-coordinate derivatives (10, 213, 325). 

NICKEL(II) CHLORIDE or NICKEL CHLORIDE HEXAHYDRATE (7718-54-9) NiClj Violent reaction with chlorine nitrate. Mixtures with potassium produces an impact-sensitive explosive. Contact with strong acids or acid fumes produces highly toxic and corrosive HCl gas. Forms heat- or shock-sensitive explosives with ammonium nitrate. Increases sensitivity to heat, impact, or friction of hydrazinium perchlorate. Incompatible with gold, lithium, sodium,... 

Thermodynamic data have been reported for the nickel chloride hexahydrate, tetrahy-drate and dihydrate, and the existence of a heptahydrate has been reported at low temperatures (below - 30°C) [33BOY]. At 0.1 MPa, in contact with saturated aqueous solutions, the hexahydrate was reported [lODERAnG] to be the stable form to approximately 36.25°C, and dehydration of the tetrahydrate to the dihydrate occurs above 60°C [33BOY], The lower hydrates can also be prepared by equilibration with aqueous HCl solutions at room temperature [23FOO]. 

Equations for dissociation pressures of nickel chloride hexahydrate to tetrahydrate and the nickel chloride hexadeuterate to tetradeuterate are presented. The equation for the deuterate reaction is based on the experimental vapour pressures reported in [37BEL]. The equation for the hexahydrate/tetrahydrate equilibrium matches the experimental points from Derby and Yngve [16DER/YNG] so well that it raises the question of whether the reported equation is from a fit to the earlier data [16DER/YNG], rather than based on new experiments. The transition temperature reported in [37BEL] matches that in [16DER/YNG] exactly (within 0.01 K). 

The heat of solution of nickel chloride hexahydrate into l.OM HCl(aq) was measured, and (6.10 0.22) kJ moT was reported (2a uncertainties). The final solution was 0.02 M in Ni. A double correction to 0.0 M HCl(aq) and to / = 0 [95MAN/KOR] would be required to use the reported value to calculate the enthalpy of solution of the salt at infinite dilution in water. The corrections themselves have large uncertainties, and this heat of solution value is not used further in the present review. 

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