Question

Half Reaction

Cr3+ (aq) + 3e- → Cr (s) E° = -0.74 V

Fe2+ (aq) + 2e- → Fe (s) E° = -0.440 V

Fe3+ (aq) + e- → Fe2+ (s) E° = +0.771 V

Sn4+ (aq) + 2e- → Sn2+ (aq) E° = +0.154 V

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

2Cr (s) + 3Fe2+ (aq) → 3Fe (s) + 2Cr3+ (aq)