Question

Why does the blue colour of copper chloride fade away during electrolysis?

Answer 1

Answer:

Copper Chloride solution is blue in color. But during this process, the blue color gradually fades away because copper chloride is being broken down. The solution becomes acidic becomes acidic because hydrochloric acid is formed.

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Answer 2

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 ionCu2+ ions in solution.