Stoichiometry and products of ozone reaction with chloride ion in an acidic medium

Abstract

It is shown by means of direct spectrophotometry in the UV and visible ranges that the only product of the O3 reaction with Cl−(aq) in an acidic medium is molecular chlorine Cl2; in solutions, it is in equilibrium with the complex ion Cl 3 − . It is found that the consumption of one ozone molecule corresponds to the formation of one chlorine molecule. The stoichiometric equation for the reaction is obtained.