Purification and Uses of zinc:
Zinc is purified by electrolytic refining. In this process, Impure Zinc is anode and cathode is of pure thin sheet of Zinc. The electrolyte is ZnSO4 solution containing a little of dil.H2SO4. On passing electric current, pure zinc get deposited at the cathode.
- It is widely used for galvanizing iron sheets.
- It is used in the extraction of gold and silver by the cyanide process.
- Zinc plates and rods are used in batteries and dry cells.
- Zinc dust and granulated zinc are used in laboratory as reducing agents.