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Title: Adding Chlorine To The Pool Post by: andzo on Sep 20, 2011 What reasons would someone add chlorine to the pool in the evening instead of morning?
Title: Re: Adding Chlorine To The Pool Post by: duddy on Sep 20, 2011 At night, chlorine is used up doing useful work in your pool, like oxidizing all that sweat and sun-tan lotion from your pool party. Remember, chlorine’s job is to oxidize bacteria, sweat, soaps, suntan lotion, and whatever other contaminants enter your pool. On the contrary, during the day, it mostly is wasted - lost to UV in the sunlight; the UV somehow deactivates it.
Title: Re: Adding Chlorine To The Pool Post by: andzo on Sep 20, 2011 due to hypochlorite ion, what would the pH of the pool be? basic?
Title: Re: Adding Chlorine To The Pool Post by: bio_man on Sep 20, 2011 chlorine Free chlorine consists of two chemicals; hypochlorous acid and the hypochlorite ion. Hypochlorous acid disinfects well while the hypochlorite ion does not. Ultra-violet (UV) light degrades hypochlorous acid to hydrochloric acid (HCl). Title: Re: Adding Chlorine To The Pool Post by: andzo on Sep 20, 2011 so does that make the pool neutral?
Title: Re: Adding Chlorine To The Pool Post by: bio_man on Sep 20, 2011 so does that make the pool neutral? I don't think so, it just neutralizes the effects of the chlorine. Title: Re: Adding Chlorine To The Pool Post by: andzo on Sep 21, 2011 what would the reaction be in presence of light
Title: Re: Adding Chlorine To The Pool Post by: bio_man on Sep 21, 2011 I know that UV splits hypochlorous acid (HOCl), producing highly reactive radicals (plus HCl) that can destroy organics. In the presence of light (i.e. from a light bulb), I don't think a reaction takes place because the spectrum is different (larger wavelengths). Hypochlorous acid can only really degrade when exposed to ultraviolet light from the sun.
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