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Is calcium hypochlorite the same thing as chlorine?

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【Summary】The active components of bleaching powder are calcium chloride and calcium hypochlorite. Calcium hypochlorite is extremely unstable. When the bleaching powder encounters water, calcium hypochlorite w

Is calcium hypochlorite the same thing as chlorine?

【Summary】The active components of bleaching powder are calcium chloride and calcium hypochlorite.

Calcium hypochlorite is extremely unstable. When the bleaching powder encounters water, calcium hypochlorite w

  • Categroy:News
  • Author:
  • Origin:
  • Release Time:2019-12-13 13:20
  • Views:
Information

Chlorine is not the same thing as bleach.

 

The principle of bleaching powder is its strong oxidation.

 

The active components of bleaching powder are calcium chloride and calcium hypochlorite.


Calcium hypochlorite is extremely unstable. When the bleaching powder encounters water, calcium hypochlorite will decompose into hypochlorous acid. Hypochlorous acid has a strong oxidizing and weak acid, and its oxidizing property can achieve the purpose of bleaching.

 

For ordinary household environments, bleach reacts to water as follows (sorry, we can't edit the subscript, just look at it.) :

 

Ca (ClO) 2 + CO2 + H2O = CaCO3 + HClO

CO2 represents carbon dioxide from the air, and the strong oxidizing pigment of hypochlorous acid oxidizes to achieve bleaching effect.

Hypochlorous acid can also break down atomic oxygen (ozone can also break down atomic oxygen), which also has a bleaching effect.

 

The relationship between bleach and chlorine gas.
Bleaching powder is made by reacting chlorine and slaked lime.

The chemical equation of its main reaction is:

Cl2 Ca (OH) 2 + 2 = 3 Ca (ClO) 2 + CaCl2 · Ca (OH) 2 · H2O + H2O

 

Proper storage of bleach.

 

Since calcium hypochlorite in the ingredients is very unstable, be sure to seal the package.

The storage place should be sealed and operated to enhance ventilation. The temperature of the warehouse should not exceed 30 ° C, and the relative humidity should not exceed 80%. Do not mix with reducing agents, acids and flammable and explosive materials. Transport must be well protected. Wear protective clothing and rubber gloves.

Should not be stored in large quantities and for a long time. Because calcium hypochlorite is very unstable, it will decompose and photolyze on its own for a long period of time, leading to failure. Its related chemical equation is:

First, it is decomposed by reaction with air: Ca(ClO)2+H2O+CO2 = CaCO3↓+2HClO

Photolysis under the action of light: 2HCLO = 2HCl+O2↑

Bleach is now dead.

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