- Redox reactions are chemical reactions involving oxidation and reduction occurring simultaneously.
- Oxidising agent is the substance that causes oxidation.
- Reducing agent is the substance that causes reduction.
Oxidation involves loss of electrons and increase in oxidation number.
Reduction involves gain of electrons and decrease in oxidation number.
Example:
The magnesium's oxidation state has increased from 0 to +2 , it has been oxidised. Magnesium acts as reducing agent. The hydrogen's oxidation state has decreased from +1 to 0 , it has been reduced. The hydrogen ion acts as a oxidising agent.
Click on the diagram below to play!
There is no change in oxidation number. Therefore, this is not a redox reaction.
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