An electrochemical cell, composed of an iron electrode (anode) immersed in 0.10 M Fe (NO3)2 and silver electrode (cathode) immersed in 0.11M AgNO3, was found to have a cell potential of 1.21V. The standard reduction potential for Ag+ / Ag half-cell is +0.80V. The standard reduction potential for the Fe+2/ Fe half – cell is -0.45V.
5. Determine the standard cell potential using the Nernst equation
- Ecell=E’cell-RT/nF ln[Fe2+]/[Ag2+]
=1.21V - 0.059/2 ln[0.10]/[0.11]