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Topic: Oxidation Numbers  (Read 2375 times)

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Offline sinthreck

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Oxidation Numbers
« on: November 09, 2010, 05:40:47 AM »


2KCl + MnO2 + 2H2SO4  :rarrow: K2SO4 + MnSO4 + Cl2 + 2H2O

I can't understand how the textbook gets the result for  MnSO4:

Mn: +2
S: +6
O: -2

The oxygen is simple enough but how do they know the other elements....
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Offline opti384

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Re: Oxidation Numbers
« Reply #1 on: November 09, 2010, 06:22:05 AM »
MnSO_4 is an ionic substance consisting of Mn2+ and SO_4^2-.
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Offline sinthreck

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Re: Oxidation Numbers
« Reply #2 on: November 09, 2010, 07:39:41 PM »
oh yes, I forgot how SO4 has a charge of 2 minus

Thanks !
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