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    kristo's Avatar
    kristo Posts: 41, Reputation: 0
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    #1

    Jan 21, 2007, 04:45 AM
    Oxidation, reduction
    Fe2O3 + 3H2 -> 2Fe + 3H2O

    Which materials are reductants, which are oxidants?
    Please explain the solution, too. Any help is appreciated :).
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Jan 21, 2007, 05:22 AM
    The oxidants oxidise other compounds, i.e. they gain oxygen (or, more completely, they gain electrons). In your case this would be H2, as they take the oxygen from the Fe2O3.

    Now use my logic to argue which are the reductants.
    kristo's Avatar
    kristo Posts: 41, Reputation: 0
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    #3

    Jan 21, 2007, 05:40 AM
    Quote Originally Posted by Capuchin
    The oxidants oxidise other compounds, ie they gain oxygen (or, more completely, they gain electrons). In your case this would be H2, as they take the oxygen from the Fe2O3.

    Now use my logic to argue which are the reductants.
    So Fe is reductant, as he loses 3 electrons?
    rudi_in's Avatar
    rudi_in Posts: 251, Reputation: 45
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    #4

    Jan 21, 2007, 06:28 AM
    Thank you for posting your question to the Ask Me Help Desk.

    Iron is reduced but it is because it gained three electrons.

    Remember this as a tool...

    OILRIG

    Oxidation Is Loss, Reduction Is Gain

    We are talking about electrons here.
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #5

    Jan 21, 2007, 10:50 AM
    Ah yes! Ignore me, rudi is right.

    It's been such a long time since I've had to think about this, my mind got confuddled.

    Well done Rudi!
    ChemCatalyst's Avatar
    ChemCatalyst Posts: 21, Reputation: 1
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    #6

    Jan 29, 2007, 04:26 PM
    Quote Originally Posted by rudi_in
    Thank you for posting your question to the Ask Me Help Desk.

    Iron is reduced but it is because it gained three electrons.

    Remember this as a tool...

    OILRIG

    Oxidation Is Loss, Reduction Is Gain

    We are talking about electrons here.
    I was taught a different acronym for remembering the difference between oxidation and reduction: LEO the lion says GER
    Lose Electrons Oxidize, Gain Electrons Reduce
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