explain electrolytic refining of sodium with labeled diagram
Answers
Electrolytic Refining: In the process of electrolytic refining a lump of impure metal and a thin strip of pure metal are dipped in the salt solution of metal to be refined. When electric current is passed through the solution, pure metal is deposited over thin strip of pure metal; from lump of impure metal.
I don't think that the electrons are used of a sulphur it is always used for a copper therefore I have answer within copper
Electrolytic refining of copper:
A lump of impure copper metal and a thin strip of pure copper are dipped in the solution of copper sulphate. Impure lump of metal is connected with the positive pole and thin strip of pure metal is connected with the negative pole. When electric current is passed through the solution, pure metal from anode moves towards cathode and is deposited over it. Impurities; present in metal are settled near the bottom of anode in the solution. Settled impurities in the solution are called anode mud.
Cu − 2e− ⇨ Cu+ +
Cu+ + + 2e− ⇨ Cu
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The impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of metal salt is used as an electrolyte. On passing the current through the electrolyte, the pure metal from the anode dissolves into the electrolyte. An equivalent amount of pure metal from the electrolyte is deposited on the cathode.The soluble impurities go into the soil, whereas, the insoluble impurities settle down at the bottom of the anode and are known as anode mud.
