What is electrolysis?

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What is electrolysis?

Electrolysis is a method of extracting metals from metal compound solutions or molten metal compounds. It is done by passing an electric current through a solution/ compound to break it up. The ions travel to the electrodes where electrons are gained or lost to make atoms. All metals above carbon e.g. aluminium, calcium, and potassium, need to be extracted from ores using electrolysis. The same method can be used in electroplating. We will be electrolyzing copper sulphate solution.

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What affects the rate?

Electrolysis uses the flow of electrons to attract positive metal ions to the cathode (-) and negative non-metal ions to the anode (+). Therefore the more charge that has passed, the more metal will be deposited on the cathode. If you leave the current on or increase the current then you get charge and get more metal deposited.

What is happening?

In the experiment I am doing I will use copper sulphate solution- Cu2+SO42-

The Anode is positively charged so attracts the SO42- and takes excess electrons. It also attracts OH-. 4OH- makes O2+2H2O+4e- (4 negative electrons). ...

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