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oxidation-reduction |
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oxidation-reductionor redoxAny chemical reaction in which electrons are transferred. Addition of hydrogen or electrons is reduction, and removal of hydrogen or electrons is oxidation (originally applied to combination with oxygen but now including transfer of hydrogen or electrons). The processes always occur simultaneously: one substance is oxidized by the other, which it reduces. The conditions of the substances before and after are called oxidation states, to which numbers are given and with which calculations can be made. (Valence is a similar but not identical concept.) The chemical equation that describes the electron transfer can be written as two separate half reactions that can in theory be carried out in separate compartments of an electrolytic cell (see electrolysis), with electrons flowing through a wire connecting the two. Strong oxidizing agents include fluorine, ozone, and oxygen itself; strong reducing agents include alkali metals such as sodium and lithium. |
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? Mentioned in | ? References in periodicals archive | |
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Oxidation-Reduction Potential (ORP) for Water Disinfection Monitoring, Control and Documentation. Charging occurs through the oxidation-reduction (redox) reaction of the radical region. Because chlorine residual values in the water would fluctuate, operators often had to set the facility's oxidation-reduction potential controller's set-point (or operating range) high to ensure that state regulations were met; this practice further increased chemical usage. |
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