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Water is frequently disinfected with chlorine gas forming hypochlorous acid (HOCI) which partially ionizes to produce hypochlorite and hydrogen ions as follows: HOCI H*

Water is frequently disinfected with chlorine gas forming hypochlorous acid (HOCI) which partially ionizes to produce hypochlorite and hydrogen ions as follows: HOCI H* + OC with equilibrium constant K = 2.9 x 10-8 Find the fraction that is hypochlorous acid as a function of pH. What is the hypochlorous acid fraction at pH = 6, 8, and 10?

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