What is the cathode half-reaction in the equation 2Mn 2+ ( aq ) + 5Sn 4+ ( aq )

Question

What is the cathode half-reaction in the equation

2Mn2+(aq) + 5Sn4+(aq) + 8H2O ? 2MnO4-(aq) + 5Sn2+(aq) + 16H+(aq)?
possible answers please explain and show work: Mn2+(aq) + 4H2O+5e- ? MnO4-(aq) + 8H+(aq) Mn2+(aq) + 4H2O ? MnO4-(aq) + 8H+(aq) + 5e- Sn4+(aq) + 2e- ? Sn2+(aq) Sn4+(aq) ? Sn2+(aq) + 2e-(aq) What is the cathode half-reaction in the equation

2Mn2+(aq) + 5Sn4+(aq) + 8H2O ? 2MnO4-(aq) + 5Sn2+(aq) + 16H+(aq)?
What is the cathode half-reaction in the equation

2Mn2+(aq) + 5Sn4+(aq) + 8H2O ? 2MnO4-(aq) + 5Sn2+(aq) + 16H+(aq)?
Mn2+(aq) + 4H2O+5e- ? MnO4-(aq) + 8H+(aq) Mn2+(aq) + 4H2O ? MnO4-(aq) + 8H+(aq) + 5e- Sn4+(aq) + 2e- ? Sn2+(aq) Sn4+(aq) ? Sn2+(aq) + 2e-(aq) Mn2+(aq) + 4H2O+5e- ? MnO4-(aq) + 8H+(aq) Mn2+(aq) + 4H2O ? MnO4-(aq) + 8H+(aq) + 5e- Sn4+(aq) + 2e- ? Sn2+(aq) Sn4+(aq) ? Sn2+(aq) + 2e-(aq) Mn2+(aq) + 4H2O+5e- ? MnO4-(aq) + 8H+(aq) Mn2+(aq) + 4H2O ? MnO4-(aq) + 8H+(aq) + 5e- Sn4+(aq) + 2e- ? Sn2+(aq) Sn4+(aq) ? Sn2+(aq) + 2e-(aq)

Explanation / Answer

reduction at cathode

so

Mn2+(aq) + 4H2O+5e- ? MnO4-(aq) + 8H+(aq)

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