How does bleaching powder sterilise drinking water?
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bleaching powder is actually commercially available chlorine in the form of calcium hypochlorite - Ca(ClO)₂. Chlorine is widely used to disinfect water and kill disease-causing pathogens such as bacteria, viruses and protozoans. ... Thus use 4–5 milligrams of bleaching powder per liter of water to disinfect it.
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This makes it easier to apply as a disinfectant in medical areas, next to its use as a bleach. When bleaching powder dissolves, it reacts with water to underchloric acid (HOCl) and hypochlorite ions (OCl-). Chlorine kills pathogens such as bacteria and viruses by breaking the chemical bonds in their molecules.
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