Question

What happens when Silver is leached with NaCN in the presence of air? 

Answer 1

 Ag is leached with NaCN in presence of air. 
₄Ag(s)+ 8CN^-(aq) + 2H₂O(aq)+ O2(g) → 4[Ag (CN)₂]^-(aq) + 4OH^- (aq)

2[Ag(CN)₂]-(aq)+Zn(s) →[Zn(CN)₄]^2- (aq) + 2Ag(s)
Ag is obtained as solid by leaching process.