Chemistry Redox ReactionsA series of free High School Chemistry Video Lessons from Brightstorm.
Oxidation Reduction Reactions - Redox Oxidation-Reduction Reactions, also called redox reactions, are reactions for which the driving force is the transfer of electrons. Oxidation is the loss of electrons and the gaining of a positive charge. Reduction is the gain of electrons and the gain of negative charge. Metals are generally oxidized and become cations while non-metals are normally reduced and become anions.
Half Reactions Half reactions are used for balancing oxidation - reduction reactions that occur in aqueous solutions. The sum of the oxidation and reduction half reactions forms the overall equation for the full reaction. To add half reactions, it is necessary for the number of electrons lost to equal the number of electrons gained.
Voltaic Cell A voltaic cell is the device in which the transfer of electrons takes place through an external pathway. The flow of electrons in a voltaic cell enable energy in form of electricity to be produced in redox reaction. The set-up of a voltaic cell includes an anode, a cathode and a salt bridge that is used to neutralize the system.
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