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Balance the following reaction in basic solution. Identify the reducing and oxidizing agent. MnO4 ^-1 (aq)...

Balance the following reaction in basic solution. Identify the reducing and oxidizing agent.

MnO4 ^-1 (aq) +Fe^+2 (aq_)--> Mn^+1 (aq) + Fe^+3 (aq) (basic)

Solutions

Expert Solution

a)

split in half reaction

MnO4- = Mn+

Fe+2 = Fe+3

balance O

MnO4- = Mn+ + 4H2O

Fe+2 = Fe+3

balance H+

8H+ + MnO4- = Mn+ + 4H2O

Fe+2 = Fe+3

balance charge

6e- + 8H+ + MnO4- = Mn+ + 4H2O

Fe+2 = Fe+3 + e-

balance e-

6e- + 8H+ + MnO4- = Mn+ + 4H2O

6Fe+2 =6 Fe+3 + 6e-

add all

6Fe+2 + 6e- + 8H+ + MnO4- = Mn+ + 4H2O + 6 Fe+3 + 6e-

cancel common terms

6Fe+2 +8H+ + MnO4- = Mn+ + 4H2O + 6 Fe+3

balance H+ with OH- so it becomes basic

8OH- + 6Fe+2 +8H+ + MnO4- = Mn+ + 4H2O + 6 Fe+3 + 8OH-

convert to water

6Fe+2 +8H2O + + MnO4- = Mn+ + 4H2O + 6 Fe+3 + 8OH-

cancel water

6Fe+2 +4H2O + + MnO4- = Mn+ + 6 Fe+3 + 8OH-

queen_honey_blossom answered 2 years ago
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