Horvath Practice Problems 110

Horvath Practice Problems 110 - A high + D low → A low +...

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27 OXIDATION—REDUCTION REACTIONS I What distinguishes this type of reaction from the others is the fact that electrons are transferred during the reaction which results in a change in the oxidation numbers of the involved compounds. We f rst need a few de f nitions. When a species increases its oxidation number during a reaction it is oxidized . When a species decreases its oxidation number during a reaction it is reduced . A species which has a tendency to be oxidized is called a reducing agent because if it is oxidized the other reactant must be reduced. A species which has a tendency to be reduced is called an oxidizing agent . A general form for the oxidation—reduction reaction is
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Unformatted text preview: A high + D low → A low + D high . (27.1) Here a species A accepts an electron from a donor species D. A is reduced since its oxidation number decreases and D is oxidized since its oxidation number increases For example an oxidation—reduction reaction between copper sulfate and zinc metal is written as CuSO 4 (aq) + Zn (s) → ZnSO 4 (aq) + Cu (s) . (27.2) It is more illustrative to write the net ionic equation by can-celling the spectator sulfate ion Cu 2+ (aq) + Zn (s) → Zn 2+ (aq) + Cu (s) . (27.3) OXIDATION—REDUCTION REACTIONS I 109...
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This document was uploaded on 11/01/2011 for the course CHM 2046 at University of Florida.

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