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Chemistry redox

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    (Original post by CheeseIsVeg)
    Yep so, sorry was eating food!
    So we have an ion here.
    So whatever happens, we need the sum of the oxidation states to have a charge of -2

    We've spoken about Oxygen always being -2
    So here we have 4 oxygens, each with -2
    -2 times 4 = -8

    Now hold on

    We need an overall charge of -2
    The only other species we have here is Mn
    so its oxidation number must be ?
    +2??
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    (Original post by Lucky10)
    +2??
    Not quite.
    Do you do maths? would it benefit you if I set it out algebraically?
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    (Original post by CheeseIsVeg)
    Not quite.
    Do you do maths? would it benefit you if I set it out algebraically?
    Yeha it would
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    (Original post by Lucky10)
    Yeha it would
    AWESOME

    So the overall charge is -2 right?
    And we've 4 oxygens at -2
    so -2 times 4 = -8

    Let the oxidation state of Mn be x

    -8 + x = -2

    Now can you work out what the oxidation state of Mn is (x) ?
 
 
 
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