Question

Is the metal obtained from Reduction pure? How can we further purify the metal.

Answer 1

Aluminium is extracted by electrolytic reduction method. In electro-refining method, impure metal is taken as anode and pure metal is made of cathode. The electrodes are placed in acidified aqueous solution of metal salt or molten metal salt. On electrolysis, the metal in anode dissolves into the solution and gets deposited over the cathode. The residue left below the anode in the electro-refining of metal is called anode mud. Aluminum metal obtained by the electrolysis of fuse alumina is about 99.5% pure. It can be further refined by Hooper's electrolytic process.

#ⓟⓘⓚⓐⓒⓗⓤ.

ⓟⓛⓔⓐⓢⓔ ⓜⓐⓡⓚ ⓐⓢ ⓑⓡⓐⓘⓝⓛⓘⓢⓣ....