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

Explanation

### Step-by-Step Solution:

1. **Understanding Leaching**: Leaching is a process used to extract valuable metals from ores by dissolving them in a solvent. In the case of low-grade copper ores, leaching is an effective method to recover copper.

2. **Reagents Used**: The primary reagents used in the leaching process for low-grade copper ores are acids (commonly sulfuric acid) and air (oxygen).

3. **Leaching Reaction**: When low-grade copper ore is treated with sulfuric acid in the presence of air, a chemical reaction occurs. The copper in the ore reacts with the acid and oxygen to form copper sulfate and water. The reaction can be represented as:
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