Balance two of the following redox equations. Identify the oxidation half reacti

Question

Balance two of the following redox equations. Identify the oxidation half reaction and the reduction half reaction. Fe^2+ + MnO4_. Fe3+ + Mn2+

Explanation / Answer

Fe+2 + MnO4- ---> Fe+3 + Mn+2 Now reduction half is MnO4- ----> Mn+2 two balance O's adding H2O on right side MnO4- -----> Mn+2 + 4H2O to balance H's adding H+ ions on left MnO4- + 8H+ ---> Mn+2 + 4H2O to balance the charge adding 5e-s on left MnO4- + 8H+ + 5e- ---> Mn+2 + 4H2O --(1) oxidation half is Fe+2 ----> Fe+3 adding e- on right to balance the charge Fe+2 ---> Fe+3 + e- multiplying above equation with 5 and adding to (1) you get MnO4- + 8H+ + 5Fe+2 ------> Mn+2 + 5Fe+3 + 4H2O

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