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Topic: can not figure out this question....  (Read 2724 times)

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Offline istrystudent678901

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can not figure out this question....
« on: April 03, 2009, 06:02:12 PM »
What is E  for O2 + 4Fe (+2 charge) +4H (+1 charge) ----> 2H20 + 4Fe (+3 charge)
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Offline lancenti

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Re: can not figure out this question....
« Reply #1 on: April 04, 2009, 05:39:52 AM »
I'm assuming that this is an Electrochemistry question.

ECell = EReduction - EOxidation

Reduction Half Equation:

4H+ (aq) + O2 (g)  :rarrow: 2H2O (l)

Oxidation Half Equation:

Fe2+ (aq)  :rarrow: Fe3+ (aq)

I don't have a data booklet with me at the moment, but you can find these values pretty easily.
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Offline lucas89

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Re: can not figure out this question....
« Reply #2 on: April 04, 2009, 05:02:26 PM »
Yeah, check the E-values in your text book possibly. If they're not in your text (which they should be), try a search online (but be aware of your source, make sure it's reliable!)
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