Question

Write the chemical rxn involved in extration process of gold . What is the role of nacn and zn in this process

Answer 1

Explanation:

Dear student,

The reactions involved are :

4Au + 8NaCN + 2H2O + O2 = 4Na[ Au(CN)2] + 4KOH

4Na[ Au(CN)2] + Zn = Na2[Zn (CN)4] + 2Au

NaCN is used to dissolve gold from aurocyanide complex . Zn is used to replace gold from the complex.

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Answer 2

Explanation:

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