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Polyphosphates are used for softening agents because theyA. form soluble complexes with anionic speciesB. precipitate anionic speciesC. form soluble complexes with cationic speciesD. precipitate cationic species.

Answer» Correct Answer - C
Polyphosphates (sodium hexametaphosphate, sodium tripolyphosphate or STPP) form soluble complexes with `Ca^(2+),Mg^(2+)` present in hard water.


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