Question:
Describe the role of NaCn in the extraction of silver from a silver ore.
Answer:
Role of NaCN in the extraction of silver (Ag) is to do the leaching of Ag ore in the presence of air from which the silver is obtained later by replacement.
4Ag + 8CN- + 2H2O + O2 → 4 [Ag(CN)2-] + 4OH-
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