Explain the following in terms of gain or loss of oxygen with two examples each.
- Addition of Oxygen to a Substance is called Oxidation.
That is, gain of Oxygen is called Oxidation.
- 2Cu + O 2 → 2CuO
In the above reaction, Oxygen is being added to Copper, hence it gets oxidised to CuO.
- C + O 2 → CO 2
In the above reaction, Oxygen is being added to Carbon, hence it gets oxidised to CO 2 .
- Removal of Oxygen from a substance is called Reduction.
That is, loss of Oxygen is called Reduction.
- CuO + H 2 → Cu + H 2 O
Oxygen is removed from Copper in the reaction, therefore reduction occurs.
- Fe 3 O 4 + 4H 2 → 3Fe + 4H 2 O
Oxygen is removed from Iron in the reaction, therefore reduction occurs.