Dive Into Success: 2025 Certified Pool Operator Practice Test – Make a Splash!

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Calcium hypochlorite contains what percent of available chlorine by weight?

25%

45%

65%

Calcium hypochlorite is a widely used disinfectant in swimming pools and other water treatment applications due to its effectiveness in maintaining water sanitation. In terms of available chlorine, calcium hypochlorite typically contains about 65% of available chlorine by weight. This means that for every 100 grams of calcium hypochlorite, approximately 65 grams is chlorine that is available for use in sanitation and disinfection processes.

This high concentration makes it a potent choice for pool sanitation, allowing for effective chlorination while requiring less material compared to compounds with lower chlorine percentages. Therefore, recognizing that calcium hypochlorite contains about 65% available chlorine is essential for understanding how to properly dose the chemical for effective pool maintenance.

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