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    cubanita12's Avatar
    cubanita12 Posts: 8, Reputation: 1
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    #1

    Apr 11, 2009, 11:03 AM
    Identify type of reaction
    Cr2O3 + H2 --> Cr + H2O

    Al + Cl3 --> AlCl3

    MgCl2 + AgNO3 --> Mg(NO3) + AgCl
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Apr 11, 2009, 03:33 PM
    Quote Originally Posted by cubanita12 View Post
    Cr2O3 + H2 --> Cr + H2O

    Al + Cl3 --> AlCl3

    MgCl2 + AgNO3 --> Mg(NO3) + AgCl
    The first is an oxidation reduction reaction. Cr2O3 is the oxidizer, H2 is the reducing agent. Cr2O3 is reduced, H2 is oxidized.

    The second is also an oxidation reduction equation, except you have it wrong. There's no such thing as . It should be



    The last is what I call a "metathetical" reaction. I think you'll probably know it as a double exchange reaction or a double decomposition reaction. Basically, the ions exchange. The "driving force" is the formation of insoluble AgCl.
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