When chlorine gas is introduced to water, what is the primary compound formed?

When chlorine gas is introduced to water, the primary compound formed is hypochlorous acid. This occurs through a reaction where chlorine gas dissolves in water and reacts with it to generate hypochlorous acid (HClO).

This reaction is significant because hypochlorous acid is a strong oxidizing agent and is used extensively in disinfection processes. It effectively kills bacteria and other microorganisms in water, making it a crucial component in sanitation and water treatment practices.

In addition to hypochlorous acid, the equilibrium in this reaction can also produce hypochlorite ions (OCl-) under certain conditions, especially in a more alkaline environment. However, the foundational compound formed directly upon the initial introduction of chlorine gas to water is hypochlorous acid.

Other potential compounds listed, such as sodium chloride, chloroform, and bromine chloride, do not form during the initial chlorination of water. Sodium chloride may be a byproduct in certain saltwater contexts, but it is not the primary compound generated from chlorine gas and water under standard conditions. Chloroform is not produced in this scenario as it requires the presence of organic compounds for its formation. Bromine chloride does not play a role in the reaction between chlorine