What is the standard cell potential (E°cell) for the voltaic cell based on the reaction below? Sn2 + (aq) + 2Fe3 + (aq) → 2Fe2 + (aq) + Sn4 + (aq)

+ 0.617 v

Explanation:

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

half-life

Sn²⁺ → Sn⁴⁺ + 2e⁻ oxidation E ox = - 0.154 v

2 Fe³⁺ + 2e⁻ → 2 Fe ²⁺ reduction E red = + 0.771 v

E° cell = E°red + E° ox = + 0.77 v + (-0.154 v) = + 0.617 v