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Question

Describe a method for refining nickel.

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Solution

The method for refining nickel involves the following:
Ni is heated with CO to form volatile nickel tetracarbonyl.
Ni+4CO330350K−−−−−Ni(CO)4
At high temperature, nickel tetracarbonyl decomposes to pure Ni.
Ni(CO)4450470K−−−−−Ni+4CO
This is Mond's process for refining Ni.

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