The reactions present in aqueous chlorine solution are redox reactions.
1, Chlorine reacts with water to form hypochlorous acid (HClO) and hydrochloric acid (HCl):
Cl2 + H2O → HClO + HCl
2, Hypochlorous acid is further decomposed to form hydrochloric acid and oxygen:
2HClO → 2HCl + O2
3, The reactions indicate
< p>These reactions show that chlorine gas is reduced from the oxidation state (0) to the chloride anion (Cl-), while water is oxidized from the oxidation state (0) by chlorine gas to hypochlorous acid and hydrochloric acid. This is a typical redox reaction in which chlorine gas is the oxidizing agent and water is the reducing agent.4, oxidizing agent
Oxidizing agent is a substance that can accept electrons from other substances to make them undergo oxidation reaction. In a chlorine solution, chlorine gas acts as an oxidizing agent because it is able to accept electrons from the water and oxidize it to hypochlorite and hydrochloric acid.
5, reducing agent
Reducing agent is a substance that can provide electrons to other substances to make them undergo a reduction reaction. In aqueous chlorine solution, water acts as a reducing agent because it loses electrons and reduces chlorine gas to chloride anions.
Disinfecting ability and use of chlorine water:
1. Disinfecting ability of chlorine water
Chlorine water has a strong disinfecting ability, and is often used as a disinfectant and bleach. Its disinfecting effect is mainly through the oxidizing ability of chlorine to kill bacteria and viruses. At the same time, chlorine can be used as a bleaching agent to remove color from the surface of objects because of its strong oxidizing properties.
2. Disinfectant
Since chlorine has strong oxidizing properties and can kill bacteria and viruses, chlorine water is often used as a disinfectant. It can be used to disinfect drinking water, swimming pool water, medical equipment, food processing and other areas, effectively preventing the spread of disease and bacterial growth.
3, bleach
Chlorine water is also often used as bleach, can be used to remove the color of the surface of the object. It can be used to bleach clothing, paper, fabric, wood and other materials to restore their whiteness or reduce the presence of coloring. The chlorine in chlorinated water destroys the structure of the pigment molecules, thus making them colorless.