Nikhil set up the given circuit for purification of copper. Observe the circuit and explain the process of purification. [4 marks]
The positive terminal of the battery is connected to the thick rod of the impure copper and the negative terminal of the battery is connected to the thin rod of the pure copper.
In the process of electroplating, both an anode and a cathode (the metal part to be coated) are immersed in a solution that is composed of a solution of copper salt (Copper sulphate (CuSO4)).
[1 mark]
Here, when the electric current is passed through electrodes, the copper from the thick impure copper plate gets dissolved in the solution as Cu+2 ions whereas those Cu+2 ions present in the solution reach to the cathode (thin pure copper plate) and get deposited over it.
[2 marks]
As a result, the thickness of the anode increases, and the thickness of the cathode decreases, by which copper is purified.
Also, The impurities will not get attracted to any of the terminals. They will settle down on the surface of the container near anode.
[1 mark]
The positive terminal of the battery is connected to the thick rod of the impure copper and the negative terminal of the battery is connected to the thin rod of the pure copper.
In the process of electroplating, both an anode and a cathode (the metal part to be coated) are immersed in a solution that is composed of a solution of copper salt (Copper sulphate (CuSO4)).
[1 mark]
Here, when the electric current is passed through electrodes, the copper from the thick impure copper plate gets dissolved in the solution as Cu+2 ions whereas those Cu+2 ions present in the solution reach to the cathode (thin pure copper plate) and get deposited over it.
[2 marks]
As a result, the thickness of the anode increases, and the thickness of the cathode decreases, by which copper is purified.
Also, The impurities will not get attracted to any of the terminals. They will settle down on the surface of the container near anode.
[1 mark]
