First slide

Hardness of water

Question

In the calgon process of softening of water, which of the following is used?

Easy

A

Sodium polymetaphosphate
B

Hydrated sodium aluminium silicate
C

Cation exchange resins
D

Anion exchange resins

Solution

In calgon process the substance which is used to remove the permanent hardness of water is $\left [ NaPO_3 \right ]_6$ .

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