iii) Copper Sulphate solution is electrolysed using copper
electrodes.
iv) A small piece of zinc is added to dilute hydrochloric acid.
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3. The change involves two electrons per copper ion. ... When copper electrodes are used in the electrolysis of copper sulfate solution, the mass loss of copper from the positive anode electrode should equal the mass of copper gained and deposited on the negative cathode electrode.
4. When zinc granules are added to dilute hydrochloric acid, then zinc chloride is formed along the evolution of hydrogen gas .
this is correct answer
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