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Electrolysis: How Does Current Affect The
Member rating: No Rating | Words: | Submitted: Mon Sep 12 2005
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Aim: The aim of this investigation is to find out how current affects the amount of copper formed at the cathode, when using copper sulphate solution and graphite electrodes. Pre-test Results: For my pre-test, I have gathered the following results: Current Volume of Copper Sulphate Time Mass of cathode before Mass of cathode after 20.2 mA 50ml3 3 minutes 3.25g 3.27g 0.1A 50ml3 3 minutes 3.11g 3.12g 0.2A 40ml3 4 minutes 3.12g 3.14g 0.4A 25ml3 5 minutes 3.14g 3.17g 0.6A 50ml3 5 minutes 3.17g 3.19g 1A 30ml3 4 minutes 3.21g 3.24g From the pre- test, I have decided: * Time: 5 minutes * Volume of Copper Sulphate Solution: 50 ml3 * Beaker size: 100ml3 * Range of Currents: 0.1A, 0.2A, 0.3A, 0.4A, 0.6A. * Current: Amps I decided to time the reaction for 5 minutes, because with lower currents, not much copper was being deposited, so I decided t time for 5 minutes so that all the different masses could have some copper collected. Using 50 ml3 of copper sulphate solution, more ions would be present in the solution so more...
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