Write one equation to show that no oxidation can occur without reduction.
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2 Mg + O2 ----> 2 [Mg2+][O2-]
If we split the equation into its oxidation and reduction reactions we get:
Mg ----> Mg2+ + 2 e-
The magnesium atom loses two electrons in the above reaction, making this part of the reaction the oxidation part.
O2 + 4 e- ----> 2 O2-
Each oxygen molecule gains four electrons to form a pair of O2- ions, making this part of the reaction the reduction reaction.
If we split the equation into its oxidation and reduction reactions we get:
Mg ----> Mg2+ + 2 e-
The magnesium atom loses two electrons in the above reaction, making this part of the reaction the oxidation part.
O2 + 4 e- ----> 2 O2-
Each oxygen molecule gains four electrons to form a pair of O2- ions, making this part of the reaction the reduction reaction.
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