ElectrochemistryA series of free High School Chemistry Video Lessons from Brightstorm.
Chemistry Corrosion Chemistry corrosion occurs as the result of the oxidation of a metal. It is the process of returning metals to their natural state which is ore. Most metals develop a thin oxide coating that protects internal atoms. The protective coating is often applied to protect the metal from oxygen and moisture.
Electrolysis Electrolysis is a process in which electrical energy is used to produce a chemical change that would not otherwise occur. First, an electric current is produced from a chemical using a oxidation-reduction reaction. Then this electric current is used to produce a chemical change. An example of electrolysis is hydrolysis, or the splitting of water into hydrogen and oxygen.
Oxidation Number Method The oxidation number method, also called oxidation states, keeps track of electrons gained when a substance is reduced and the electrons lost when a substance is oxidized. Each atom in a neutral molecule or charged species is assigned an oxidation number. When there is an increase in the oxidation number, oxidation occurs. When there is a decrease in the oxidation number, reduction occurs. The sum of all the oxidation numbers in a compound is equal to its overall charge.
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