Mole ConceptHard

Question

The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na (Mol. w.t 206). What would be the maximum uptake of Ca2+ ions by the resin when expressed in mole per gram resin ?

Options

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Solution

For softening of hard water by ion exchange resin method, reaction involved is 2C8H7SO3Na + Ca+2 →  (C8H7SO3)2 Ca + 2Na+
2 mol    1 mol
412 gm 1 mol
1 gm mol

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