Explain with example, oxidation and reduction take place simultaneously.
Redox reaction is a reaction in which oxidation and reduction take place simultaneously.
For example: The formation of Magnesium oxide from Mg and O2 is a redox reaction.
2Mg + O2 = 2MgO
Here magnesium is oxidised by loss of two electrons per atom to form Mg2+ ion and oxygen gains two electrons per atom O2- ion.
2Mg – 4e → 2Mg2+ (Oxidation)
O2 + 4e → 2O2- (reduction)