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प्रश्न
How is leaching carried out in case of low grade copper ores?
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उत्तर
In the case of low-grade copper ores, leaching is carried out using acid or bacteria in the presence of air. In this process, copper goes into the solution as Cu2+ ions.
\[\ce{Cu_{(s)} + 2H^+_{ (aq)} + \frac{1}{2}O2_{(g)} -> Cu^{2+}_{ (aq)} + 2H2O_{(l)}}\]
The resulting solution is treated with scrap iron or H2 to get metallic copper.
\[\ce{Cu^{2+}_{ (aq)} + H2_{(g)} -> Cu_{(s)} + 2H^+_{ (aq)}}\]
संबंधित प्रश्न
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