Problem 3 Water disinfection. Chlorine is used widely as a disinfectant and is commonly added as sodium hypochlorite (NaOCI). This salt dissociated completely into Nat and Cl-. The forms of chlorine are then determined based on the equilibrium constant of hypochlorous acid, HCIO. The pKa of HOCI is 7.54 at 25C Calculate the [HCIO]/[CIO-] RATIO and the [HCIO] FRACTION at each of the following pHs. Show calculations, summarize in a table pH [HCIO]/[CIO-] RATIO [HCIO] FRACTION NI 5.4 7.54 9.6