CHEM 1A03 Lecture Notes - Lecture 9: Redox, Oxidizing Agent, Royal Aircraft Factory F.E.2
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28 Jun 2016
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When copper(ii) ions react spontaneously with zinc metal. A copper (ii) ion has a stronger attraction for the valence electrons of a zinc atom than zinc. A reducing agent is a substance that loses or gives up electrons to another substance in a redox reaction. Reducing agent + fe2o3(s) (cid:314) fe + other products (cid:315) (cid:313) (cid:315) _______(cid:313) reduction. An oxidizing agent is a substance that gains or removes electrons from another substance in a redox reaction. Oxidizing agent + mgo (cid:314) mg2+ + other products. If a positively charged metal ion reacts, then it is usually converted to a metal atom. According to redox theory, this requires a gain of electrons and hence the metal ion is behaving as an oxidizing agent. Similarly, if a metal atom reacts, then it is always converted to a positively charged ion by losing electrons. In all redox reactions, electrons are transferred from a reducing agent to an oxidizing agent.
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