Question

reaction of electrolytic refining​

Answer 1

At Anode:- Cu(s) ⟶ Cu2+(aq) + 2e−

At Cathode:- Cu2+ + 2e− ⟶ Cu(s)

Explanation:

Let's take an example of Electrolytic refining of Cu

In electrolytic refining of Cu metal a setup is arranged in which two electrode are present, one cathode (made up of pure metal) and other one is anode (made up of impure metal).

Both the electrodes are suspended in electrolyte which is the solution of salt of the metal. When current passed, metal ions from the electrolyte deposited at cathode in pure metal form and an equivalent amount of metal dissolve from the anode.

At Anode:- Cu(s) ⟶ Cu2+(aq) + 2e−

At Cathode:- Cu2+ + 2e− ⟶ Cu(s)

Answer 2

Electrolytic Refining.

• Electrolytic Refining is the process in which metals are refined by passing electricity through it. This process is called electrolysis.

• In the process of purification by electrolytic refining​ a large piece of impure metal is taken as anode and a small piece of pure metal is taken as cathode.

• An solution of the metallic salt is used as the electrolyte or the medium for electrolytic refining​.

• When current is passed through it the pure metal gets separated out from the anode and gets deposited in the cathode.

• The impure substances gets settled down at the bottom and is known as anode mud.

• This method is used for the refining of Gold,Silver,Copper etc.