(AIEEE 2011) The molecular formula of a commercial resin used for exchanging ions in water softening — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
(AIEEE 2011) The molecular formula of a commercial resin used for exchanging ions in water softening is $C_8H_7SO_3Na$ (Mol. wt. 206). What would be the maximum uptake of $Ca^{2+}$ ions by the resin expressed in mole per gram resin?
Answer: D
💡 Solution & Explanation
Reaction: $2Resin\text{-}Na + Ca^{2+} \rightarrow Resin_2\text{-}Ca + 2Na^+$. <br>2 moles of resin (412 g) uptake 1 mole of $Ca^{2+}$. <br>Uptake per gram $= 1 / 412$ mol/g. [1, 7]
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