Explain, how the blue colour of electrolyte fades during electrolysis

1.	Explain, how the blue colour of electrolyte fades during electrolysis of CuSO4 solution ?
Answer» The blue colour of electrolyte is due to the presence of copper ions in it. As the electrolysis is . carried out, the copper ions discharge at the cathode. Cu²⁺ + 2e^– ⟶ Cu However, no copper ions enters in the electrolyte from anode. Thus concentration of copper ions goes on decreasing. This result in fading of blue colour. When copper ions completely finish the electrolyte becomes colourless. Reaction of cathode: H⁺ + e^– ⟶ H H + H ⟶ H₂ Reaction of anode : OH^– – 1e^– ⟶ OH 4OH ⟶ 2H₂O + O₂(g)

Explain, how the blue colour of electrolyte fades during electrolysis of CuSO4 solution ?

Answer»

The blue colour of electrolyte is due to the presence of copper ions in it. As the electrolysis is . carried out, the copper ions discharge at the cathode.

Cu²⁺ + 2e^– ⟶ Cu

However, no copper ions enters in the electrolyte from anode. Thus concentration of copper ions goes on decreasing. This result in fading of blue colour. When copper ions completely finish the electrolyte becomes colourless.

Reaction of cathode:

H⁺ + e^– ⟶ H

H + H ⟶ H₂

Reaction of anode :

OH^– – 1e^– ⟶ OH

4OH ⟶ 2H₂O + O₂(g)

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Explain, how the blue colour of electrolyte fades during electrolysis of CuSO4 solution ?

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