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What is cementation ?...

What is cementation ?

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Gold can be recovered by reaching the deoxygenated leached solution with zinc.In this process the gold is reduced to its elemental state(zero ocidation sate) and the process is called cemetation `Zn_((s))+2[Au(CN)_(2)]_((aq))^(-)to[Zn(CN)_(4)]_((aq))^(-)+2Au_(s)`
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