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Electrolysis Reactions


andie

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Hey!

I am doing an experiment of electrolysis with initially a copper strip attached to the negative terminal of a battery. A strip of aluminium is then attached to the positive terminal and both electrodes are placed in a copper sulfate solution. My observations are only that oxygen gas is formed on the aluminium electrode while in the solution, but no real reaction occurs.

 

When i switch the copper strip to the positive terminal and the aluminium strip to the negative terminal I see that copper has been deposited on the aluminium.

 

What are the reactions for these two options????

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