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Polyphosphates are used for softening ag...

Polyphosphates are used for softening agents because they

A

form soluble complexes with anionic species

B

precipitate anionic species

C

form soluble complexes with cationic species

D

precipitate cationic species.

Text Solution

Verified by Experts

The correct Answer is:
C
Polyphosphates (sodium hexametaphosphate, sodium tripolyphosphate or STPP) form soluble complexes with `Ca^(2+),Mg^(2+)` present in hard water.
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