Disinfectants and Disinfection By-Products Session Objectives
Chlorine is the most widely used drinking-water disinfectant. When added to water the following reaction occurs within a second or less: Cl2 + H2O = HOCl + H + + Cl-The magnitude of the equilibrium hydrolysis constant is such that hydrolysis to hypochlorous acid, HOCl, is virtually complete in fresh water at pH > 4 and at chlorine doses up to 100