Hi Can anyone explain WHY the surface area of the electrode has no effect on the voltage of an electrochemical cell? I am running a course which requires investigating such factors and cannot find any secondary references to the situation - Unlike temperetaure and concentration and electrode metal which are all covered by Nernst. As I understand it an equilibrium is set up in each half cell by atoms becoming ions or visa versa. This produces an unmeasurable internal emf in the half cell. When we connect it to another cell however we can measure in relation to that. so my theory is that when we increase the surface area of the electrode this would increase both the electrons left on the metal and the ions produced …. so overall the difference in potential in the half cell would be the same. Thoughts? This is driving me mad.