As the pH increase the disinfection ability of chlorine becomes ___.

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Multiple Choice

As the pH increase the disinfection ability of chlorine becomes ___.

Explanation:
The disinfecting power of chlorine comes mainly from hypochlorous acid (HOCl), which is a much stronger disinfectant than the hypochlorite ion (OCl−). As pH rises, the equilibrium shifts from HOCl toward OCl−, so the fraction of chlorine in the more effective form decreases. That leads to weaker overall disinfection, especially at higher pH levels (above roughly 8). So increasing pH makes chlorine less effective at disinfecting.

The disinfecting power of chlorine comes mainly from hypochlorous acid (HOCl), which is a much stronger disinfectant than the hypochlorite ion (OCl−). As pH rises, the equilibrium shifts from HOCl toward OCl−, so the fraction of chlorine in the more effective form decreases. That leads to weaker overall disinfection, especially at higher pH levels (above roughly 8). So increasing pH makes chlorine less effective at disinfecting.

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