Water is frequently disinfected with chlorine gas, forming hypochlorous acid (HOCI), which partially ionizes to hypoclorite and hydrogen ions as follows: 21 HOCI 2 H+ + OCI- with equilibrium constant Ka1 = 2.9 X 10-8 The amount of [HOCI], which is the desired disinfectant, depends on the pH. Find the fraction that is hypochlorous acid-that is, [HOCI]/{[HOCI] + [OCI"]}-as a function of pH. What would the hypochlorous fraction be for pH = 6,8, and 10? %3D

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