Tag: chemistry

A solution of the metal salt is used as an electrolyte. Impute metal is made the anode and a thin strip of pure metal is made of cathode.

Separation of impurities from the extracted metals is generally done by electrolysis of impure metals.

Lead is refined by electrolytic method. The other metals which are also refined by this method are aluminium and copper.

Sodium metal is refined by electrolytic method. 

Iron obtained after extraction by reduction contains 3−4% carbon and other impurities like phosphorus, manganese etc. This is called as pig iron.

By heating pig iron in furnace it is converted to wrought iron. It is the pure form of iron which contains carbon. It is soft, grey, tough, malleable and ductile.

Refining consists of purifying an impure material, in this case, a metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.

The purest copper is obtained by an electrolytic process, undertaken using a slab of impure copper as the anode and a thin sheet of pure copper as the cathode. The electrolyte is an acidic solution of copper sulphate. 

The purest copper is obtained by an electrolytic process, undertaken using a slab of impure copper as the anode and a thin sheet of pure copper as the cathode.

Definition of electrolytic reduction: Removal of oxygen (or decrease of its active valency in the case of a positive element) by electrical means.