One approach would be to reduce nickel oxide in a hydrogen stream.
Alternatively, one could oxidize NiS on an oxygen stream to get rid of the volatile sulfur.
An alternative approach would be to electrowin the metal from an acid solution, i.e. by electroplating.
If you required very high purity Ni, then zone refiningof a cylindrical sample will produce very pure metal.
[For example, high purity Tantalum, 99.999%, may be produced by this method.]
Nope . It's a mixture of many pure substances
Samples that are pure water include distilled water, rainwater, and water that has been filtered through a reverse osmosis system. These samples do not contain any dissolved minerals or impurities.
The density of pure aluminium is the same for all samples.
One common method to obtain pure samples of selenium is through the process of sublimation. Selenium can be heated to a temperature where it vaporizes and then allowed to condense back into a solid state in a clean container, resulting in a relatively pure sample. Further purification techniques such as recrystallization or distillation may also be employed to increase the purity of the sample.
Only refined water (by distillation, ion exchangers, reverse osmosis etc.) may be pure.
you google it Fractional liquefaction of air.
Pure plutonium is obtained as a result of the reaction of PuF4 with calcium, barium or lithium.
Nickel is a chemical element; therefore, any object that contains only nickel is a pure substance.
Nope . It's a mixture of many pure substances
Nickel is a chemical element, and as such, it is a pure substance.
The most straightforward way to make a pure sample of calcium is to electrolyze a molten calcium salt with an "inert" cathode such as platinum. Considerable care is required to prevent reaction of pure calcium with the ambient atmosphere.
Samples that are pure water include distilled water, rainwater, and water that has been filtered through a reverse osmosis system. These samples do not contain any dissolved minerals or impurities.
Usually from metals such as steel and nickel. Like pure steel, nickel wrapped steel, pure steel etc
You can buy pure element samples from reputable online suppliers such as Luciteria or GalliumSource. These suppliers offer a wide range of pure element samples for educational and collection purposes. Be sure to verify the credibility of the supplier before making a purchase.
http://en.wikipedia.org/wiki/Nickel#Extraction_and_purification
The density of pure aluminium is the same for all samples.
yeayayaya