Certified Pool Operator Practice Test

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Which chemical is commonly used to raise the pH of pool water?

  1. Calcium chlorine

  2. Sodium bicarbonate

  3. Sodium carbonate

  4. Sodium hypochlorite

The correct answer is: Calcium chlorine

Calcium chloride is commonly used to raise the pH of pool water because it is a basic compound that neutralizes acid and increases pH levels. Sodium bicarbonate (baking soda) and sodium carbonate (washing soda) can also raise pH levels but may also increase alkalinity and cloud the water. Sodium hypochlorite (bleach) is a disinfectant and will not affect the pH levels of the pool water.

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