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Colgon is used to soften hard water. But, is there any method to regenerate exhausted colgon?

Colgon is used to soften hard water. But, is there any method to regenerate exhausted colgon?

Grade:

2 Answers

SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Dear srinivas,

Calgon process

Calgon is a trade name of a complex salt, sodium hexametaphosphate

(NaPO3)6. It is used for softening hard water. Calgon ionizes to give a complex anion:

ionization of calgon

The addition of Calgon to hard water causes the calcium and magnesium ions of hard water to displace sodium ions from the anion of Calgon.

addition of Calgon to hard water

This results in the removal of calcium and magnesium ions from hard water in the form of a complex with Calgon. The water is softened and sodium ions are released into water.

 

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Sagar Singh

B.Tech IIT Delhi

sagarsingh24.iitd@gmail.com



Rishi Sharma
askIITians Faculty 646 Points
one year ago
Dear Student,
Please find below the solution to your problem.

Calgon is a trade name of a complex salt, sodium hexametaphosphate(NaPO3)6.
It is used for softening hard water.
Calgon ionizes to give a complex anion:

[ionization of calgon]
The addition of Calgon to hard water causes the calcium and magnesium ions of hard water to displace sodium ions from the anion of Calgon.

[addition of Calgon to hard water]
This results in the removal of calcium and magnesium ions from hard water in the form of a complex with Calgon.
The water is softened and sodium ions are released into water.

Thanks and Regards

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