Klor

Diketahui bahwa E°(O/HO) = +1.229 V (kurang dari +1.395 V) maka dapat diperkirakan bahwa klorin semestinya dapat mengoksidasi air menjadi oksigen dan asam hidroklorat. However, the kinetics of this reaction are unfavorable, and there is also a bubble effect to consider, so that electrolysis of aqueous chloride solutions evolves chlorine gas and not oxygen gas, a fact that is very useful for the industrial production of chlorine.