Copper sulphate solution is electrolysed using copper electrodes. Stu

1.	Copper sulphate solution is electrolysed using copper electrodes. Study the diagram given below and answer the question that follows : (i) Which electrode to your left or right is known as the oxidising electode and why ? (ii) Write the equation representing the reaction that occurs. (iii) State two appropriate observations for the above electrolysis reaction.
Answer» (i) Electrode on the left side is the oxidising electrode because copper atoms lose electrons at this electrode. (ii) At anode : Cu - 2e^- -----> Cu²⁺ At cathode : Cu²⁺ + 2e^- -----> Cu (iii) (1) Reddish brown copper metal is deposited at cathode so anode becomes thin and cathode grows thick gradually. (2) Blue colour of aqueous copper (II) sulphate solution remains unchanged.

Copper sulphate solution is electrolysed using copper electrodes. Study the diagram given below and answer the question that follows : (i) Which electrode to your left or right is known as the oxidising electode and why ? (ii) Write the equation representing the reaction that occurs. (iii) State two appropriate observations for the above electrolysis reaction.

Answer»

(i) Electrode on the left side is the oxidising electrode because copper atoms lose electrons at this electrode.

(ii) At anode : Cu - 2e^- -----> Cu²⁺

At cathode : Cu²⁺ + 2e^- -----> Cu

(iii) (1) Reddish brown copper metal is deposited at cathode so anode becomes thin and cathode grows thick gradually.

(2) Blue colour of aqueous copper (II) sulphate solution remains unchanged.