Redox Reactions

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Oxidation is the process in which an atom, molecule, or ion loses one or more electrons. Example: Zn(s) → Zn2+(aq) + 2e−…

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Reduction is the process in which an atom, molecule, or ion gains one or more electrons. Example: Cu2+(aq) + 2e− → Cu(s)…

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Oxidation and reduction occur simultaneously. One species loses electrons only when another species gains them. Free electrons do not exist independently in the system, so the electrons released in ox…

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A redox reaction is a reaction in which electrons are transferred from one reactant to another. Example: Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)…

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Balanced equation: 2Mg(s) + O2(g) → 2MgO(s). Magnesium is oxidised to Mg2+, and oxygen is reduced to O2−. This is a redox reaction because oxidation and reduction happen together.

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Oxidation is the process in which a substance adds oxygen or removes hydrogen. Example: C(s) + O2(g) → CO2(g)…

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Reduction is the process in which a substance adds hydrogen or removes oxygen. Example: CuO(s) + C(s) → Cu(s) + CO(g)…

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An oxidising agent is a substance that gains electrons and itself gets reduced. In the classical view, it provides oxygen or removes hydrogen. Example: O2 in C + O2 → CO2 acts as an oxidising agent.