Polarization

Ions traveling toward the electrodes will quickly form dense clouds near the electrode surfaces. They cannot physically cross the solid/liquid barrier, and the voltage is usually too low for significant electrolysis to occur (forming elemental sodium and chlorine gas for our example.) But the cloud of negative ions will present a rising counter emf at the positive electrode, and vice-versa. The result is that current flow rapi

• April 7th, 2014
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