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Why does bleach bleach and disinfect?

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  • Release Time：2023-04-21 14:33
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【Summary】When we first learned chemistry, we did such an experiment, we put salt in the electrolytic tank, after electricity, we will see that there is a large amount of chlorine gas produced on the anode, because salt is a compound of metal sodium and chlorine gas. When you turn on the electricity, you break down the sodium and chlorine in the salt. If chlorine gas is passed through lime (sodium hydroxide), bleaching powder, also known as chlorinated lime, can be obtained.

Why does bleach bleach and disinfect?

【Summary】When we first learned chemistry, we did such an experiment, we put salt in the electrolytic tank, after electricity, we will see that there is a large amount of chlorine gas produced on the anode, because salt is a compound of metal sodium and chlorine gas. When you turn on the electricity, you break down the sodium and chlorine in the salt. If chlorine gas is passed through lime (sodium hydroxide), bleaching powder, also known as chlorinated lime, can be obtained.

  • Categroy：News
  • Author:
  • Origin:
  • Release Time：2023-04-21 14:33
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When we first learned chemistry, we did such an experiment, we put salt in the electrolytic tank, after electricity, we will see that there is a large amount of chlorine gas produced on the anode, because salt is a compound of metal sodium and chlorine gas. When you turn on the electricity, you break down the sodium and chlorine in the salt. If chlorine gas is passed through lime (sodium hydroxide), bleaching powder, also known as chlorinated lime, can be obtained.
The main components of bleaching powder are calcium hypochlorite [Ca(CLO)2] and basic calcium chloride (CaCL2). It is a white powder substance with a strong chlorine odor. When it reacts with carbon dioxide and water in the air, it forms hypochlorous acid (HCLO), an extremely unstable chemical that easily breaks down reactive oxygen, or atomic oxygen. This oxygen has a strong oxidation effect, it can combine with colored substances, it can decompose all the colors, it can turn those colored articles into colorless. This is the basic principle of bleaching powder to bleach things.
Bleaching powder is used for bleaching and decontamination of the magic thing, such as clothing is accidentally stained with ink, washing powder or soap is not washed off, then can use 15% bleach powder and 15% borax mixed evenly, and then add 70% water put in the bottle shaking, with its solution can remove ink stains; The wooden utensils in the kitchen, vegetable basket and other dirty also very difficult to clean, at this time, available bleach solution will be immersed in the utensils overnight, in the second day with water can be clean; Apply a layer of lower concentration of bleach powder solution to the silverware. When you see black spots on the surface of the silverware, you can polish it with fine gauze. In short, in life, there are many ways to remove pollution with bleaching powder.
At present, in addition to bleaching, bleaching powder has a major use, is disinfection. Most water plants use bleach to disinfect the tap water we drink daily. The principle of bleaching powder disinfection in tap water is that bleaching powder will produce extremely unstable hypochlorous acid after meeting water. At this time, the chlorine atoms and oxygen atoms generated by the decomposition of hypochlorous acid will produce strong bactericidal effect through oxidation and chlorination, and quickly kill bacterial spores, viruses and fungi. Therefore, bleaching powder for the disinfection of livestock houses, tools, vehicles, etc., is also a good material that is both economical and affordable.
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