Metals & Non-metals (C10)

Suggest different chemical processes used for obtaining a metal from its oxides for metals in the middle of the reactivity series and metals towards the top of the reactivity series. Support your answer with one example each.

Answer

1. For obtaining metals that are in the middle of the reactivity series, oxides of such metals can be reduced with coke (carbon) which acts as a reducing agent.

Example:

2 Fe2O3 + 3 C ----> 4 Fe + 3 CO2

2. For obtaining metals that are high in the reactivity series, their oxides are reduced to metals by the process of electrolysis.

Example: Electrolysis of sodium chloride

At cathode: Na+ + e- -----> Na

At anode: 2 Cl- ----> Cl2 + 2e-