Choose the cell notation that corresponds to anelectrochemical cell that has the

Question

Choose the cell notation that corresponds to anelectrochemical cell that has the electrode reactions shown.

VO2+(aq) + 2H+(aq) + e- VO2+(aq) + H2O(l)
MnO2(s) + 2H2O(l) MnO4-(aq) + 4H+(aq) +3e- St. Red. Pot. (V) MnO4-/MnO2 +1.68 VO2+/VO2+ +1.00

Pt(s) l MnO2(s) lMnO4-(aq), H+(aq) llH+(aq), VO2+(aq),VO2+(aq) l Pt(s) Pt(s) l MnO2(s) lMnO4-(aq) l H+(aq) llH+(aq) l VO2+(aq) lVO2+(aq) l Pt(s) Pt(s) l MnO2(s) lMnO4-(aq) ll VO2+(aq),VO2+(aq) l Pt(s) Pt(s) l H+(aq),VO2+(aq), VO2+(aq) llMnO2(s) l MnO4-(aq),H+(aq) l Pt(s) Choose the cell notation that corresponds to anelectrochemical cell that has the electrode reactions shown.

VO2+(aq) + 2H+(aq) + e- VO2+(aq) + H2O(l)
MnO2(s) + 2H2O(l) MnO4-(aq) + 4H+(aq) +3e- St. Red. Pot. (V) MnO4-/MnO2 +1.68 VO2+/VO2+ +1.00

St. Red. Pot. (V) MnO4-/MnO2 +1.68 VO2+/VO2+ +1.00 Choose the cell notation that corresponds to anelectrochemical cell that has the electrode reactions shown.

VO2+(aq) + 2H+(aq) + e- VO2+(aq) + H2O(l)
MnO2(s) + 2H2O(l) MnO4-(aq) + 4H+(aq) +3e- St. Red. Pot. (V) MnO4-/MnO2 +1.68 VO2+/VO2+ +1.00

Pt(s) l MnO2(s) lMnO4-(aq), H+(aq) llH+(aq), VO2+(aq),VO2+(aq) l Pt(s) Pt(s) l MnO2(s) lMnO4-(aq) l H+(aq) llH+(aq) l VO2+(aq) lVO2+(aq) l Pt(s) Pt(s) l MnO2(s) lMnO4-(aq) ll VO2+(aq),VO2+(aq) l Pt(s) Pt(s) l H+(aq),VO2+(aq), VO2+(aq) llMnO2(s) l MnO4-(aq),H+(aq) l Pt(s)

Explanation / Answer

In the above reaction reduction potential ofMnO4-/MnO2 infers us that it isweak reducing agent than VO2+/VO2+system. So it preffers to undergo reduction rather thanoxidation. So the reduction half cell reaction is corresponding toMnO4-/MnO2 system. Where asVO2+/VO2+ system undergoesoxidation. Now the reaction can be represented as Pt(s) l H+(aq), VO2+(aq),VO2+(aq) ll MnO2(s) lMnO4-(aq), H+(aq) l Pt(s)

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