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Amanda Gaulter October 2001 Investigating one of the factors that affects the mass of copper deposited when copper sulphate solution is electrolysed using copper electrodes Factors: current time temperature molarity/concentration of solution volume of solution size of electrodes I have decided to investigate how current affects the mass of copper deposited as it is an easy quantity to measure and record, whilst at the same time keeping the other variables constant. Variables: Independent: current Dependant: mass of copper deposited on electrodes Constant: time that each solution is electrolysed for temperature volume of copper sulphate size of beaker size of electrodes molarity of solution To make it a fair test: · keep the temperature the same throughout the experiment as this may alter the final results · keep the concentration of copper sulphate the same throughout. Too low a concentration wouldn't affect the electrolysis as the current wouldn't flow properly so that not much would happen, and too high a concentration would be dangerous. I am going to use a...

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