Answer:
The standard cell potential (E°cell) for the voltaic cell based on the reaction below is 0.64 V.
Explanation:
Let's consider the following redox reaction.
Sn²⁺(aq) + 2 Fe³⁺(aq) → 2 Fe²⁺(aq) + Sn⁴⁺(aq)
We can recognize the following half-reactions.
Cathode (reduction): 2 Fe³⁺(aq) + 2 e⁻ → 2 Fe²⁺(aq) E°red = 0.77 V
Anode (oxidation): Sn²⁺(aq) → Sn⁴⁺(aq) + 2 e⁻ E°red = 0.13 V
The standard cell potential (E°cell) is the difference between the standard reduction potential of the cathode and the standard reduction potential of the anode.
E°cell = E°red, cat - E°red, an = 0.77 V - 0.13 V = 0.64 V
