Calcium hypochlorite is made by reacting chlorine with which substance?

Calcium hypochlorite is made by reacting chlorine with which substance?

• A. Lime
• B. Water
• C. Sand
• D. Acid

Answer: (A)

Calcium hypochlorite is formed when chlorine gas is reacted with lime (calcium hydroxide). The lime provides calcium and an alkaline medium that allows chlorine to oxidize and combine with calcium to make calcium hypochlorite (along with calcium chloride and water in the balanced reaction). Water doesn’t supply calcium, sand is inert, and acid would lead to different products, not the calcium hypochlorite needed for disinfection. So the substance that must react with chlorine to form calcium hypochlorite is lime.

Calcium hypochlorite is formed when chlorine gas is reacted with lime (calcium hydroxide). The lime provides calcium and an alkaline medium that allows chlorine to oxidize and combine with calcium to make calcium hypochlorite (along with calcium chloride and water in the balanced reaction). Water doesn’t supply calcium, sand is inert, and acid would lead to different products, not the calcium hypochlorite needed for disinfection. So the substance that must react with chlorine to form calcium hypochlorite is lime.