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How does Calgon prevent the precipitation of hardness ions in hard water?

Options

  1. ABy increasing the solubility of hardness ions
  2. BBy decreasing the temperature of the water
  3. CBy reacting with hardness ions to form insoluble compounds
  4. DBy reducing the pH of the water

Correct answer

A. By increasing the solubility of hardness ions

Step-by-step solution

Calgon prevents the precipitation of hardness ions in hard water by increasing the solubility of these ions through complexation.

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