Certified Pool Operator Practice Test

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Sodium hypochlorite in its commercial form contains what percent of available chlorine?

  1. 10-12%

  2. 30-32%

  3. 50-52%

  4. 70-72%

The correct answer is: 10-12%

Sodium hypochlorite is a chemical compound used in many household and industrial cleaning products. It is most commonly known in its commercial form as bleach. The concentration of available chlorine in sodium hypochlorite can vary depending on the product's intended use. Generally, household bleach contains 5-6% available chlorine, while industrial grade sodium hypochlorite can contain anywhere from 10-20% available chlorine. This means that the correct answer, 10-12%, is the most accurate representation of the concentration of available chlorine in commercial sodium hypochlorite. The other options, B, C, and D, have higher percentages which do not accurately reflect the concentration in commercial bleach products.

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