total chlorine pocket colorimeter Articles
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What’s the difference between free and total chlorine?
The element Chlorine exists as a gas Cl2, when this is mixed with water it forms hypochlorous acid (HOCl) which is the disinfecting agent; Cl2 + H2O HCl + HOCl This HOCl can partly disassociate to form the hypochlorite ion OCl-; HOCl H+ + OCl- All of the hypochlorous acid (HOCl) and hypochlorite ion (OCl-) species are referred to as free chlorine. These species can then react with nitrogen ...
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