Redox
chemical reaction involving reduction and oxidation of different species
Redox ( RED-oks, REE-doks, reduction–oxidation or oxidation–reduction) is a type of chemical reaction in which the oxidation states of the reactants change. Oxidation is the loss of electrons or an increase in the oxidation state. Reduction is the gain of electrons or a decrease in the oxidation state. The oxidation and reduction processes occur simultaneously in the chemical reaction.
Redox reactions fall into two classes. In electron transfer, a single electron usually flows from the atom, ion, or molecule being oxidized to the one being reduced; this is often described in terms of redox couples and electrode potentials. In atom transfer, an atom passes from one substrate to another; for example, in the rusting of iron the oxidation state of the iron atoms increases as the metal converts to an oxide and oxygen is reduced as it absorbs the released electrons.
Redox reactions occur throughout nature and industry. Cellular respiration and photosynthesis, combustion, and the corrosion of metals all proceed through redox chemistry, as do the reactions that power batteries and other electrochemical cells. Industry uses redox reactions to extract metals from their ores by smelting, to electroplate objects, and to manufacture chemicals such as nitric acid.
“Redox” enters the record as chemical reaction involving reduction and oxidation of different species. Crown Archives preserves that source wording while asking what Redox, chemical and reaction can confirm, complicate or overturn.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Sep 17, 2026. The linked authority identifier is Q82682. The Library of Congress control number is sh85096311. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
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This entry incorporates text from “Redox” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.