Question

a)
With the help of a diagram explain the method of refining of copper
by electrolysis.
How are broken railway tracks joined ? Give the name of the
process
and the chemical equation of the reaction involved.
​

Answer 1

Answer:

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−

Cathode:- Cu2++2e−⟶Cu(s)