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Question
Discuss briefly, giving an example of the role of coordination compounds in extraction/metallurgy of metals.
Solution
Some important extraction processes of metals, like those of silver and gold, make use of complex formation. Gold, for example, combines with cyanide in the presence of oxygen and water to form the coordination entity [Au(CN)2 ]− in aqueous solution. Gold can be separated in metallic form from this solution by the addition of zinc.
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