Say you have salt water. If you apply an voltage between two electrodes Na+ ions will drift towards the negative electrode and Cl- ions towards the positive electrode. If a redox reaction happens at the electrodes, the ions transfer electrons to the electrodes and current continues to flow until all the ions are reduced/oxidized. Now what happens if there are no redox reactions? Wouldn't the ions just accumulate at the electrodes, eventually screening out the potential and therefore the current would stop flowing? If thats the case how do ppl measure the conductivity of electrolytes? It seems Kohlrausch's law says current will flow even if there is no redox, how is this possible? Or is it only possible to have AC current in such situations?