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Second, a swimmerâs body has a pH between 7.2 and 7.8, so if the. pool water isnât kept in this range then swimmers will start to feel irritation of their. eyes and skin. Keeping the pH in this range will balance chlorineâs germ-killing.
Successful disinfection with hypochlorite depends on the chlorine demand of the. water to be disinfected and the wastewater pH. When NaOCl is added to water, it dissociates to form hypochlorous acid (HOCl) and hypochlorite ion (OCl-), collectively known as free chlorine, with a pK value for this reaction of about 7.6.