Problem: The standard cell potential (E°cell) for the voltaic cell based on the reaction below is __________ V.Sn2+(aq) + 2Fe3+(aq) → 2Fe2+(aq) + Sn4+(aq)Half-reaction                                           E° VCr3+ (aq) + 3e- → Cr                             -0.74Fe2+ (aq) + 2e- → Fe                            -0.44Fe3+ (aq) + 3e- → Fe2+                         +0.771Sn4+ (aq) + 2e- → Sn2+                         +0.154  a. -0.617 Vb. +0.617 V c. -0.594 Vd. +0.594 Ve. -0.332 V

FREE Expert Solution

We're being asked to determine the cell potential of the given reaction using the provided Ecell potentials:

Sn2+(aq) + 2Fe3+(aq)  2Fe2+(aq) + Sn4+(aq)

Notice that the half-cell reactions involved are:

Fe3+ (aq) + 3e- Fe2+            +0.771
Sn4+ (aq) + 2e- Sn2+            +0.154  

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Problem Details

The standard cell potential (E°cell) for the voltaic cell based on the reaction below is __________ V.

Sn2+(aq) + 2Fe3+(aq) → 2Fe2+(aq) + Sn4+(aq)

Half-reaction                                           E° V

Cr3+ (aq) + 3e- → Cr                             -0.74
Fe2+ (aq) + 2e- → Fe                            -0.44
Fe3+ (aq) + 3e- → Fe2+                         +0.771
Sn4+ (aq) + 2e- → Sn2+                         +0.154  

a. -0.617 V

b. +0.617 V 

c. -0.594 V

d. +0.594 V

e. -0.332 V

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