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Elsner Equation On Gold Leaching

The chemical reaction is called the Elsner Equation as follows : 4Au + 8NaCN + O 2 + 2H 2 O → 4Na Au 2 + 4NaOH. It is an electrochemical process in which oxygen picks up electrons from the gold at a cathodic area, whilst gold ions are rapidly complexed by the cyanide around the anodic area to form the soluble aurocyanide complex.

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