How is leaching carried out in case of low grade `Cu` ores ?

Explanation

Leaching of low grade copper ores is carried out with acids in the presence of air. Thus, copper goes into the solution as `Cu^(2+)` ions.
`2Cu(s)+2H_(2)SO_(4)(aq)+O_(2)(g) rarr 2CuSO_(4)(aq)+2H_(2)O(l)`
`"or, "Cu(s)+2H^(+)(aq)+(1)/(2)O_(2)(g)rarr Cu^(2+)(aq)+H_(2)O(l)`