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30 August, 10:53

Single and double replacement

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  1. 30 August, 12:08
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    A single replacement or single displacement reaction is a reaction in which one substance replaces another.

    A + BC → AC + B

    The replacement of an ion in solution by a metal higher in the activity series is a special example of this reaction type.

    The relative positions of the elements in the activity series provides the driving force for single displacement reactions.

    A double replacement reaction is one in which there is an actual exchange of partners between reacting species. This reaction is more common between ionic substances;

    AB + CD → AC + BD

    Such reactions are usually driven by;

    formation of precipitation formation of water and a gaseous product
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