6.12 Describe a method for refining nickel.

Answers (1)

Nickel is refined by Mond's Process, in which Nickel is heated in steam in presence of Carbon monoxide (CO) to form nickel carbonyl complex .(Ni(CO)_{4}) The complex is volatile in nature.

Ni+4CO\overset{330K-350K}{\rightarrow} Ni(CO)_{4})

This complex is decomposed at high temperature to get a pure nickel.

Ni(CO)_{4}\overset{450K-470K}{\rightarrow} Ni+4CO

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