Redox Reaction

  • Thread starter Numbnut247
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  • #1
Numbnut247
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Hey guys, how can I tell whether a reaction is a redox reaction?

For example:

2H2O --> 2H2 + O2
 

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  • #2
GCT
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You've got to look at the respective elements and whether there are changes in the oxidation states; oxidation and reduction, electron transfer.
 
  • #3
Curious3141
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Numbnut247 said:
Hey guys, how can I tell whether a reaction is a redox reaction?

For example:

2H2O --> 2H2 + O2

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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