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Fe ^2+ + MnO - 4 → Fe 3+ + Mn 2+

Explanation:

Explanation:

You follow a series of steps in order:

Identify the oxidation number of every atom.

Determine the change in oxidation number for each atom that changes.

Make the total increase in oxidation number equal to the total decrease in oxidation number.

Place these numbers as coefficients in front of the formulas containing those atoms.

Balance all remaining atoms other than  

O

and  

H

.

Balance  

O

.

Balance  

H

.

Check that atoms and charges balance.

Here's how it works. Your unbalanced equation is