Hey guys, how can I tell whether a reaction is a redox reaction?
2H2O --> 2H2 + O2
You've got to look at the respective elements and whether there are changes in the oxidation states; oxidation and reduction, electron transfer.
On the left hand side, what are the respective oxidation numbers for hydrogen and oxygen (in water)?
On the right hand side, what are the respective oxidation numbers for H and O? (hint : constituent atoms of elemental molecules have zero oxidation number).
Is there any change in the oxidation number from left to right hand side? So is it a redox reaction?
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