What is the Difference Between Chlorine and Sodium Hypochlorite?

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Chlorine and sodium hypochlorite are both chemical compounds containing the element chlorine, but they have different properties, structures, and uses. The main differences between chlorine and sodium hypochlorite are:

  1. State: Chlorine is a gas at room temperature, while sodium hypochlorite is a liquid. Chlorine has the chemical formula Cl2, whereas sodium hypochlorite has the formula NaClO.
  2. Strength: Chlorine is a stronger oxidizing agent compared to sodium hypochlorite. When applied, a higher amount of bleach (sodium hypochlorite) is needed to increase the chlorine level of water to the desired point.
  3. Composition: Sodium hypochlorite is composed of sodium, oxygen, and chlorine, and is commonly known as bleach. It is often used as a disinfectant or a bleaching agent.
  4. Applications: Chlorine is commonly used in the production of a wide range of consumer products, including plastics, solvents, and disinfectants. Sodium hypochlorite is a common liquid bleach and is also used as a disinfectant or a bleaching agent.

In summary, chlorine is a gas and a stronger oxidizing agent, while sodium hypochlorite is a liquid bleach with a lower chlorine content. Both compounds have distinct properties and applications, making them suitable for different purposes.

Comparative Table: Chlorine vs Sodium Hypochlorite

Here is a table comparing the differences between chlorine and sodium hypochlorite:

Property Chlorine Sodium Hypochlorite
Chemical Formula Cl2 NaOCl
Description Chlorine is an element on the periodic table and exists as a gaseous form. Sodium hypochlorite, commonly known as bleach, is a solution made from reacting chlorine with a sodium hydroxide solution.
Ionic Form Cl- ClO-
pH Effect Chlorine changes forms based on its pH, with hypochlorous acid (HOCl) and hypochlorite ions (OCl-) coexisting in a solution. Sodium hypochlorite has a second-order decomposition rate, which means that reducing the concentration by half will reduce the decomposition rate factor by 5.
Disinfection Effectiveness Hypochlorous acid (HOCl) is 80 to 120 times more effective than sodium hypochlorite. Sodium hypochlorite is a disinfectant and cleaning agent, but less effective than hypochlorous acid.
Stability Chlorine gas is unstable and reactive. Sodium hypochlorite is chemically unstable and exists in an unhappy state, making it reactive.

Chlorine gas is a very reactive and potentially dangerous chemical, while sodium hypochlorite, or bleach, is a solution made from reacting chlorine with a sodium hydroxide solution. The two compounds have different chemical properties and are used for different purposes, with sodium hypochlorite commonly used as a disinfectant and cleaning agent.