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Polyphosphates like calgon are used as water softening agents because they

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By Expert Faculty of Sri Chaitanya
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a
form soluble complexes with anionic species
b
precipitate anionic species
c
form soluble complexes with cationic species
d
precipitate catonic species
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detailed solution

Correct option is C

Because calgon forms soluble complex with cationic species.

ctaimg

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The molecular formula of a commercial resin used for exchanging ion in water softening is C8H7SO3 Na (mol. wt. = 206). What would be the minimum uptake of Ca2+ ions by the resin when expressed in mole per gram resin ?

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