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What factors affect the amount of copper-plated on the cathode by electrodes of copper sulphate?
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What factors affect the amount of copper-plated on the cathode by electrodes of copper sulphate? Introduction: Electrolysis is the decomposition of a substance by passing an electric current. Some substances are strong and others weak, depending on how they can be decomposed. E.g. sodium chloride is a strong electrolyte and water is a weak electrolyte. Oil is not an electrolyte because it does not decompose by passing an electric current. Variables: 1. Time - The longer the electrodes are in the solution the more mass will be lost at the anode and gained at the cathode. 2. Current - With a greater charge, the copper at the anode has to decompose more to give more electrons. 3. Temperature of electrodes - If an electrode gets hot it will expand. 4. Concentration of copper sulphate - The stronger the solution the more copper ions there will be to take electrons from the cathode. Surface area of electrode -...
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