Is Mn+7 +5e- —>Mn+2 oxidation or reduction
The reaction Mn+7 + 5e- —> Mn+2 is a reduction reaction. In this reaction, the Mn+7 ion gains electrons (represented by the 5e-) and is reduced to Mn+2 ion.
To determine whether the reaction is oxidation or reduction, we need to compare the change in oxidation state (also known as oxidation number) of the element in question (Mn) before and after the reaction.
In this reaction:
Mn+7 + 5e- -> Mn+2
Mn starts with an oxidation state of +7 and ends with an oxidation state of +2.
Since the oxidation state of Mn decreases from +7 to +2, this means that Mn undergoes reduction. Therefore, the reaction Mn+7 + 5e- -> Mn+2 is a reduction reaction.
To determine if the reaction is an oxidation or reduction, you need to compare the oxidation states of the element involved before and after the reaction.
In this case, we have Mn+7 on the left side of the reaction and Mn+2 on the right side. The oxidation state of manganese decreases from +7 to +2. A decrease in oxidation state indicates a reduction.
Therefore, the reaction is a reduction.