Nickel chloride solution

Urushibara Ni A (U-Ni-A) 6 The solids prepared by the reaction of zinc dust with aqueous nickel chloride solution, in the same way as described above, are transferred into 160 ml of 13% acetic acid and digested at 40°C until the evolution of hydrogen gas subsides or the solution becomes pale green. The catalyst can be washed with water on a glass filter under gentle suction with care to prevent the catalyst from contacting air, and then with the solvent for hydrogenation. 

A compound of similar composition has been obtained by the action of hydrogen peroxide upon free nickel hydroxide or upon cooled nickel chloride solution to which potassium hydroxide in alcoholic solution is added-4 It is a greyish green substance giving all the reactions of hydrogen peroxide, and is quite different from the foregoing isomeride. Pellini suggests that it is a true peroxide, namely ... 

It has been prepared in the crystalline form similar to the mineral by heating solutions of potassium sulphide and nickel chloride to 160-180° C. in a sealed tube.8 Ammonium thiocyanate and nickel chloride solutions under similar conditions produce the same sulphide.9... 

The nickel ethylenediamine nitrate reagent is conveniently prepared when required by treating a little nickel chloride solution with ethylenediamine until a violet colour (due to the formation of the complex [Ni(en)3]2+ ion) appears. Concentration limit 1 in 25,000. 

Calibration. The mass susceptibility of an aqueous nickel chloride solution is... 

Procedure Gradually add, in portions, ammonia solution to the green-colored nickel chloride solution until the color turns violet. Show and compare a 3D-model for the octahedron structure of the hexa ammine complex. Slowly add sodium hydroxide solution (drop by drop) into the violet-colored solution, for comparison also to the green-colored nickel chloride solution. 

The liquid withdrawn from the reactor is cooled, and the unconverted alcohol and salts are extracted by a nickel chloride solution. The extract is purified and the alcohol recovered is recycled. The raffinate is neutralized by sodium carbonate to remove the acids formed (hydrochloric and acrylic acids especially), and then fractionated in a series... 

Smurov precipitated nickel carbonate by mixing aqueous sodium carbonate and nickel chloride solutions. The solid phase obtained was washed free of chloride and used for the solubility study, but no attempt was made to characterise its stoichiometry and/or its crystal structure. The precipitate was equilibrated with water in a temperature range between 278.15 and 353.15 K. For each temperature the partial pressure of carbon dioxide was varied from 0.0005 atm to = 1 atm. Smurov s data have been ex-... 

Nickel ethylenediamine nitrate reagent. This reagent should be prepared when required from 2 ml 0.5m nickel chloride solution by adding ethylenediamine dropwise, until a violet colour appears. The colour is due to the formation of the complex ion [Ni(NH2-CH2-CH2-NH2)3] ". ... 

Nickel chloride 0.05% nickel chloride solution. This salt gives a gray-black stain. 

Fig. 13 Relative viable cell number of each culture condition added to an extract of nickel-titanium alloy. No addition of extract was used for the control culture ctmditirai (n = 3). Nickel ion indicates 84 pM of nickel chloride solution was added to the supernatant of MOLT-3...

No clear picture of complexing behavior in aqueous nickel chloride solutions has yet been presented. As with cobalt chloride, Libus and Tialowska (OlO) suggest the NiCl complex exists as an outer-sphere ion pair [NifOHa >6 ]... 

The viscosity of PEK in 1% nickel acetate solution was found to increase with increasing conversion suggesting chelate formation of between PEK and nickel ion. This results in chain extension. When PVA films were exposed to oxidant for 20 seconds, enough exidation occurred so that the resulting PEK forms nickel chelates when treated with nickel chloride solution. 

How many milligrams of nickel chloride are in a solution if 503 mg of silver chloride is precipitated in the reaction of silver nitrate and nickel chloride solutions ... 

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