Redox Reaction Balancing

Balance the following redox reaction in acidic solution: Fe2+ + MnO4- -> Fe3+ + Mn2+

• Fe2+ + 2MnO4- -> 2Fe3+ + Mn2+

• 3Fe2+ + 4H+ + 2MnO4- -> 3Fe3+ + 2Mn2+ + 2H2O

• 5Fe2+ + 8H+ + MnO4- -> 5Fe3+ + Mn2+ + 4H2O

• Fe2+ + 2MnO4- -> Fe3+ + 2Mn2+

Balance the following redox reaction in basic solution: Cr(OH)3 + ClO3- -> CrO4- + Cl-

• 6H2O + 2Cr(OH)3 + 6ClO3- -> 2CrO4- + 6Cl- + 6H+ + 6OH- + 2H2O2

• 6H2O + 2Cr(OH)3 + 6ClO3- -> 2CrO4- + 6Cl- + 6H+ + 6OH-

• 6H2O + 2Cr(OH)3 + 6ClO3- -> 2CrO4- + 6Cl- + 6H+ + 6OH- + 2H2O

• 6H2O + 2Cr(OH)3 + 6ClO3- -> 2CrO4- + 6Cl- + 6H+ + 6OH- + 2H2O3

Balance the following redox reaction in acidic solution: H2O2 + Cr2O7^2- -> Cr^3+ + O2

• 4H2O2 + 4Cr2O7^2- + 5H+ -> 8Cr^3+ + 4O2 + 5H+

• 3H2O2 + 3Cr2O7^2- + 4H+ -> 6Cr^3+ + 3O2 + 4H+

• H2O2 + Cr2O7^2- + H+ -> 2Cr^3+ + O2

• 2H2O2 + 2Cr2O7^2- + 3H+ -> 4Cr^3+ + 2O2 + 3H+

Balance the following redox reaction in basic solution: NO2- + Al -> NH3 + Al(OH)4-

• 3NO2- + 8Al + 10OH- -> 3NH3 + 8Al(OH)4-

• 4NO2- + 10Al + 12OH- -> 4NH3 + 10Al(OH)4-

• 3NO2- + 8Al + 10OH- -> 3NH3 + 8Al(OH)3-

• 2NO2- + 6Al + 8OH- -> 2NH3 + 6Al(OH)4-

Balance the following redox reaction in acidic solution: Cu + NO3- -> Cu^2+ + NO

• Cu + 2HNO3 -> Cu(NO3)2 + NO2 + H2O

• Cu + 4HNO3 -> Cu(NO3)2 + 2NO2 + 2H2O

• Cu + 4HNO3 -> Cu(NO3)2 + 2NO + H2O

• Cu + 3HNO3 -> Cu(NO3)3 + NO + H2O

Balance the following redox reaction in basic solution: MnO4- + H2S -> MnO2 + S

• 3MnO4- + 4H2S + 8OH- -> 3MnO2 + 4S + 4H2O + 4H2O2

• 3MnO4- + 4H2S + 8OH- -> 3MnO2 + 4S + 4H2O

• 3MnO4- + 4H2S + 8OH- -> 3MnO2 + 4S + 4H2O + 4H2O

• 3MnO4- + 4H2S + 8OH- -> 3MnO2 + 4S + 4H2O + 4OH-

Balance the following redox reaction in acidic solution: Br2 + OH- -> BrO3- + Br-

• 6Br2 + 12OH- -> 2BrO3- + 10Br- + 4H2O

• 4Br2 + 8OH- -> 2BrO3- + 6Br- + 4H2O

• 6Br2 + 12OH- -> 2BrO3- + 10Br- + 6H2O

• 8Br2 + 16OH- -> 2BrO3- + 14Br- + 8H2O

Balance the following redox reaction in basic solution: Fe^2+ + O2 -> Fe(OH)3

• Fe^2+ + O2 + 3H2O -> Fe(OH)3

• Fe^2+ + O2 + H2O -> Fe(OH)3

• 2Fe^2+ + 1/2O2 + 3H2O -> 2Fe(OH)3

• Fe^2+ + O2 + 2H2O -> Fe(OH)3

Balance the following redox reaction in acidic solution: Cr + HNO3 -> Cr^3+ + NO

• 14H+ + 6Cr + 3HNO3 -> 6Cr^3+ + 3NO + 8H2O

• 14H+ + 6Cr + 3HNO3 -> 6Cr^3+ + 3NO + 5H2O

• 14H+ + 6Cr + 3HNO3 -> 6Cr^3+ + 3NO + 6H2O

• 14H+ + 6Cr + 3HNO3 -> 6Cr^3+ + 3NO + 7H2O

Balance the following redox reaction in basic solution: MnO4- + H2O2 -> MnO2 + O2

• MnO4- + 2H2O2 -> MnO2 + O2 + H2O

• 3MnO4- + 6H2O2 -> 3MnO2 + 4O2 + 6H2O

• 2MnO4- + 6H2O2 -> 2MnO2 + 5O2 + 6H2O

• 2MnO4- + 4H2O2 -> 2MnO2 + 3O2 + 4H2O