Suggest why the colour of the copper sulfate solution fades during electrolysis. Please help! Thank you:)

The traces of hydrogen ions are not discharged, so you not see any gas bubbles collecting on the negative cathode electrode. The blue colour fades as more and more copper is deposited, depleting the concentration of the blue copper ion Cu2+ ions in solution.

Explanation:

a electronegativity decreases beacuse the size of nucleus is bigger.

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