What is the process of leaching in case of low grade copper ores ?

Explanation

The leaching of low grade copper ores is carried out with acids in presence of air when copper goes into solution as `Cu^(2+)` ions. Thus,
`2Cu_(s)+2H_2SO_4+O_2to2CuSO_4+2H_2O_(1)`
or `Cu(s)+2H^(o+)+(1)/(2)O_2toCu^(2+)+H_2O_(1)`