The following is a chem guide link. Remember that the extraction of reactive metals didn't really occur until the discovery of electricity and electrolysis. Electrolysis is where a voltage is applied to cause a non spontaneous reaction to occur
Electrolysis
The following is a link to the interactive syllabus. It has the standard hydrogen electrode, the standard electrode potential values, balancing redox reactions, working out voltage, predicting spontaneity and something about electrolysis.
balancing redox equations etc
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