How to Determine if a Reaction is a Redox Reaction?

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To determine if a reaction is a redox reaction, one must analyze the changes in oxidation states of the elements involved. In the example provided, the oxidation states of hydrogen and oxygen in water are compared to their states in the products. If there is a change in oxidation numbers, it indicates that electron transfer has occurred, confirming it as a redox reaction. The key is to identify whether any element has undergone oxidation or reduction. Understanding these concepts is essential for classifying reactions accurately.
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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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You've got to look at the respective elements and whether there are changes in the oxidation states; oxidation and reduction, electron transfer.
 
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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