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Q.
What is the process of leaching in case of low grade copper ores?
General Principles and Processes of Isolation of Elements
Solution:
Leaching of low grade copper ores is carried out with acid or bacteria, when copper goes into solution as $Cu^{2+}$ ions.
$Cu^{2+}_{\left(aq\right)} + H_{2\left(g\right)} \to Cu_{\left(s\right)} + 2H^{+}_{\left(aq\right)}$