Given the following two half-reactions, determine which overall reaction is spontaneous and calculate its standard cell potential. Cd2+(aq) + 2…

Given the following two half-reactions, determine which overall reaction is spontaneous and calculate its standard cell potential.

Cd2+(aq) + 2 e- ® Cd(s) E° = -1.21 V

Sn2+(aq) + 2 e- ® Sn(s) E° = -0.14 V