MetallurgyHard
Question
Which metal is extracted using a hydrometallurgical process involving complexation?
Options
A.Mg
B.Ag
C.Cu
D.Zn
Solution
4Ag + 8CN- + 2H2O → 4[Ag(CN)2]- (soluble complex) + 4OH-
2[Ag(CN)2]- + Zn → 2Ag + [Zn(CN)4]2-
2[Ag(CN)2]- + Zn → 2Ag + [Zn(CN)4]2-
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