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Polyphosphates are used as water softeni...

Polyphosphates are used as water softening agents because they

A

Form soluble complexes with anionic species

B

Precipitate anionic species

C

Forms soluble complexes with cationic species

D

Precipitate cationic species

Text Solution

Verified by Experts

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