What is the name for the chlorine available in a water system after the demand?

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Study for the Small Water System Operator Certification Exam. Utilize flashcards and multiple choice questions with hints and explanations. Prepare effectively for success!

Multiple Choice

What is the name for the chlorine available in a water system after the demand?

Explanation:
After chlorine is added to water, some of it reacts with substances in the water until the demand is met. The portion that remains available to continue disinfecting is the free chlorine residual. This residual is made up of hypochlorous acid and hypochlorite ion. Combined chlorine refers to chloramines formed when chlorine reacts with ammonia, and total chlorine is the sum of free chlorine residual and combined chlorine residual. So, the chlorine available after the demand is satisfied is the free chlorine residual.

After chlorine is added to water, some of it reacts with substances in the water until the demand is met. The portion that remains available to continue disinfecting is the free chlorine residual. This residual is made up of hypochlorous acid and hypochlorite ion. Combined chlorine refers to chloramines formed when chlorine reacts with ammonia, and total chlorine is the sum of free chlorine residual and combined chlorine residual. So, the chlorine available after the demand is satisfied is the free chlorine residual.

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