Calgon is used for water treatment. Which of the following statements is NOT true and Calgon? 

Calgon is used for water treatment. Which of the following statements is NOT true and Calgon? 

  1. A

    Calgon contains the 2nd most abundant element by weight in the Earth’s crust.

  2. B

    It does not remove Ca2+  ion by precipitation.

  3. C

    It is also known as Graham’s salt

  4. D

    It is polymeric compound and is water soluble.

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    Solution:

    Na2Na4P6O182Na++Na4P6O182. The sodium ions are replaced by calcium ions or magnesium ions and hence the hardness is decreased.

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