The hydrometallurgical leaching of silver ore () using the cyanide process (Mac-Arthur Forrest proce — Metallurgy and Isolation of Elements Chemistry Question
Question
The hydrometallurgical leaching of silver ore ($Ag_2S$) using the cyanide process (Mac-Arthur Forrest process) involves specific equilibrium shifts. Which of the following statements correctly characterize this extraction?
Answer: A,B,D
💡 Solution & Explanation
Zinc is used because it is more electropositive and acts as a stronger *reducing* agent (not oxidizing) than silver, displacing it from the complex. Air is blown in to oxidize $Na_2S$ so the reversible reaction goes to completion.
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