Ch 18 Flashcards

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oxidation-reduction reaction/redox reaction

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A chemical reaction in which electrons are transferred from one substance to another.

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oxidation

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The loss of electrons from a reacting substance.

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reduction

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The gain of electrons by a reacting substance

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oxidation number

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A number assigned to an atom or ion to indicate its degree of oxidation or reduction

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oxidizing agent

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A substance that oxidizes another substance by accepting its electrons

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reducing agent

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A substance that reduces another substance by losing electrons

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oxidation number method

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The technique that can be used to balance more difficult redox reactions, based on the fact that the number of electrons or ions transferred from atoms must equal the number or electrons or ions accepted by other atoms.

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species

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Any kind of chemical unit involved in a process

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half-reaction

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one of two parts of a redox reaction-the oxidation half, which shows the number of electrons lost when a species is oxidized, or the reduction half, which shows the number of electrons gained when a species is reduced