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Practical Experiment: Electrolysis Introduction: During electrolysis, electrical energy is converted into chemical energy, forcing chemical reactions to take place. The negative cell emf of an electrolytic cell indicates that the overall reaction does not occur spontaneously but rather needs electricity for the reaction to take place. In an electrolytic cell, two electrodes are immersed in a common electrolyte. At the cathode, one of the electrodes, reduction takes place, but as it is attached to the negative terminal, it has a negative charge. The anode, the positively charged electrode is where oxidation takes place. To predict the products of electrolysis, all possible reactions must be considered. If aqueous electrolytes are present or reactive electrodes used, all possible half reactions for each electrode should be considered, with the half reaction with the most positive Eo value being the most likely to occur. Electrodes such as carbon and platinum are inert and simply provide a surface for...

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