Question

In an activity, Aishu was given two substances: Copper Sulphide (Cu₂S) and Copper Oxide (Cu₂O) to obtain copper from these compounds. She was able to extract Copper successfully. Illustrate with the help of chemical equations how Aishu might have completed the activity.

Answer 1

Aishu extracted copper from Copper Sulphide using the equation \[\ce{2Cu2S + 3O2(g) -> [Heat] 2Cu2O(s) + 2SO2(g)}\] and from Copper Oxide using \[\ce{2Cu2O + Cu2S -> [Heat] 6Cu(s) + SO_2(g)}\]

Explanation:

1. To extract copper from Copper Sulphide \[\ce{Cu2S}\] , Aishu can use a process called roasting, which involves heating the compound in the presence of oxygen. The reaction can be represented as:
   \[\ce{2Cu2S + 3O2(g) -> [Heat] 2Cu2O(s) + 2SO2(g)}\]
2. Next, to extract copper from Copper Oxide \[\ce{Cu2O}\], Aishu can use a reduction reaction, typically involving carbon (in the form of coke). The reaction can be represented as:
    \[\ce{2Cu2O + Cu2S -> [Heat] 6Cu(s) + SO_2(g)}\] 

3. Combining both reactions, Aishu successfully extracts copper from both compounds. The overall process involves roasting Copper Sulphide to produce copper and sulfur dioxide, and reducing Copper Oxide to produce copper and carbon monoxide.