Question

Electroplating and electrorefining of metals

Answer 1

Answer:

electrorefining of metals:

Electrorefining refers to the process of using electrolysis to increase the purity of a metal extracted from its ore (compound or mixture of compounds from which a metal can be extracted commercially). The anode, positive electrode, is the impure metal to be purified.

Electroplating  of metals:

Electroplating is the process of plating one metal onto another by hydrolysis, most commonly for decorative purposes or to prevent corrosion of a metal. There are also specific types of electroplating such as copper plating, silver plating, and chromium plating.

Explanation:

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Answer 2

Answer:

Electroplating

Electroplating is the process in which a noble metal is usually deposited on the surface of a metal to prevent rusting. In the process the metal to be electroplated is made cathode and a soluble salt of the sacrifice metal is taken as electrolyte. By applying current, the sacrifice metal deposited on the surface of the metal in the form of layers and thus prevent rusting.

Electrolytic refining

Electrolytic refining is the process of refining impure metals by using electricity. In this process, impure metal is made the anode and a strip of pure metal is made the cathode. A solution of a soluble salt of the same metal is taken as the electrolyte. When an electric current is passed, metal ions from the electrolyte are deposited at the cathode as pure metal and the impure metal from the anode dissolves into the electrolyte in the form of ions. The impurities present in the impure metal gets collected below the anode. This is known as anode mud.

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