Question

A galvanic (voltaic) cell consists of an electrode composed of iron in a 1.0 M iron(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C. Standard reduction potentials can be found here (https://sites.google.com/site/chempendix/potentials)

Answer 1

anode : Fe (s) --------------> Fe+2 + 2e-                Eo = - 0.44 V

cathode : 2Ag+ + 2e-   -------------> 2 Ag (s)           Eo = + 0.80 V

Eo cell = Eocathode - Eo anode

            = 0.80 - (- 0.44)

            = 1.24 V

standard potential Eo = 1.24 V