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What is electrolysis?

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ELECTROLYSIS 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. ...read more.


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). The Anode is made of copper so the copper looses electrons and becomes positively charged. These copper ions then move to the cathode. The Cathode is negatively charged so attracts copper ions. The copper ions gain electrons and become copper atoms. ...read more.


Preliminary Experiment I am changing the time that the electrodes are in the solution. I will test to see what voltage to use and what times are sensible. I have decided to use 4V from 1 to 5 minutes. Prediction I predict that Results Here are the results I gathered: Time (mins) Anode mass (g) Cathode mass (g) Anode loss (g) Cathode Gain (g) 1 0.29 0.32 0 0 1.5 0.31 0.30 0 1 2 0.33 0.29 2 1 2.5 0.37 0.32 2 1 3 0.32 0.30 3 2 3.5 0.26 0.34 4 3 4 0.33 0.36 4 3 4.5 0.28 0.26 5 5 5 0.30 0.28 5 6 ...read more.

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