Electrochemistry The Principle of Oxidation–Reduction (redox) Reactions - Science Assignment Help

Assignment Task

Electrochemistry

Electrolyic cells are of two types, galvanic and electrolysis, both employing the principle of oxidation–reduction (redox) reactions. In galvanic (or voltaic) cells, redox reactions occur spontaneously as is common with all portable batteries of which we are very familiar. Electriccars,flashlights, watches, computers, cell phones operate because of a specific spontaneous redox reaction. Electrolysis cells are driven by nonspontaneous redox reactions, reactions that require energy to occur. The recharging of batteries, electroplating and refining of metals, and generation of various gases all require the use of energy to cause the redox reaction to proceed.Experimentally, when copper wire is placed into a silver ion solution, copper atoms spontaneously lose electrons (copper atoms are oxidized) to the silver ions (which are reduced). Silver ions migrate to the copper atoms to pick up electrons and form silver atoms at the copper metal–solution interface; the copper ions that form then move into the solution away from the interface. 

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