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It is said that electrolytic refining of...

It is said that electrolytic refining of copper is economic. Why?

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Yes. This is due to the formation of anode sludge which consist of Au,Ag and PT
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MAXIMUM PUBLICATION-MODEL PAPER1 -EXAMPLE
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  9. Which substances are used as the anode, cathode and electrolyte when c...

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  10. It is said that electrolytic refining of copper is economic. Why?

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