What chemicals are formed when chlorine gas is injected into water?

What chemicals are formed when chlorine gas is injected into water?

• A. Carbon dioxide and calcium hypochlorite
• B. Hypochlorous acid and hydrochloride acid
• C. Ammonia and sodium chloride
• D. Ozone and chlorine dioxide

Answer: (B)

When chlorine gas is injected into water, a critical reaction occurs that primarily leads to the formation of hypochlorous acid and hydrochloric acid. Chlorine gas (Cl2) reacts with water (H2O) to yield hypochlorous acid (HOCl) and hydrochloric acid (HCl). Hypochlorous acid is the active disinfectant that is highly effective in killing bacteria and other pathogens, making it essential for water treatment processes. This compound is formed because chlorine gas tends to interact with water molecules, and the reaction essentially hydrates the chlorine, leading to the generation of acids that contribute to the overall chemistry of the water treatment process. This understanding is vital for water distribution operators, as it helps ensure the proper management of chlorination processes, monitoring of chlorine levels, and effectiveness in disinfection. The other answer choices reference chemical products that do not form from the direct interaction of chlorine gas and water in typical water treatment scenarios.

When chlorine gas is injected into water, a critical reaction occurs that primarily leads to the formation of hypochlorous acid and hydrochloric acid. Chlorine gas (Cl2) reacts with water (H2O) to yield hypochlorous acid (HOCl) and hydrochloric acid (HCl).

Hypochlorous acid is the active disinfectant that is highly effective in killing bacteria and other pathogens, making it essential for water treatment processes. This compound is formed because chlorine gas tends to interact with water molecules, and the reaction essentially hydrates the chlorine, leading to the generation of acids that contribute to the overall chemistry of the water treatment process.

This understanding is vital for water distribution operators, as it helps ensure the proper management of chlorination processes, monitoring of chlorine levels, and effectiveness in disinfection. The other answer choices reference chemical products that do not form from the direct interaction of chlorine gas and water in typical water treatment scenarios.