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) A)+0.46 B)+0.617 C)+1.39 D)-0.46 E)+1.21

Question

Quizplus · Accepted Answer

To calculate the standard cell potential, we need to add the standard reduction potentials of the half-reactions:
Sn4+ + 2e- → Sn2+ | E° = -0.14 V (reduction at anode)
Fe3+ + e- → Fe2+ | E° = +0.77 V (reduction at cathode)

E°cell = E°reduction (cathode) - E°reduction (anode) = +0.77 - (-0.14) = +0.617 V (since the reaction is spontaneous, the standard cell potential is positive)

The Standard Cell Potential (E°cell)for the Voltaic Cell Based on the Reaction

The Standard Cell Potential (E°_cell)for the Voltaic Cell Based on the Reaction