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Matthew Smith 10 Brown 21.6.2002 How does the change in the electric current used in the electrolysis of copper sulphate solution affect the mass of copper deposited on the copper electrodes? Aim The aim of this experiment is to find out whether the mass of copper deposited on copper electrodes during the electrolysis of copper sulphate solution changes when the current used to electrolyse the solution is increased. Hypothesis I predict that if the current used to electrolyse the copper sulphate solution is increased, then the mass of copper deposited on the copper cathode will increase. Also as the current is increased the mass of the anode will decrease. I also predict that the mass change of the copper electrodes is directly proportional to the current. This is because of what happens during electrolysis. All electrolytes contain ions, positively and negatively charged ions. In copper sulphate there are positively charged copper ions (Cu2+) and negatively charged sulphate...

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