Question

he standard cell potential (E° cell) for the voltaic cell based on the reaction below is ________ V. Sn 2+ (aq) + 2Fe 3+ (aq) → 2Fe 2+ (aq) + Sn 4+ (aq)

Answer 1

The options in the question are:

a) +0.46 V

b) +0.617 V

c) +1.39 V

d) -0.46 V

e) +1.21 V

Answer:

b) +0.617 V

Explanation:

The equation shows that the anode is Sn2+/Sn4+ while the cathode is Fe3+/Fe2+.

The E° cell is obtained from E°cathode - E°Anode

E°cathode= 0.154V

E°Anode= 0.771V

E° cell= E°cathode - E°Anode= 0.771-0.154=0.617