(JEE Main 2015) The molecular formula of a commercial resin used for exchanging ions in water soften — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
(JEE Main 2015) The molecular formula of a commercial resin used for exchanging ions in water softening is $C_8H_7SO_3Na$ (Mol. wt. 206). Maximum uptake of $Ca^{2+}$ ions by the resin (mole per gram resin) is:
Answer: D
💡 Solution & Explanation
**Note: Duplicate of Serial No. 112.** 2 moles resin exchange 1 mole $Ca^{2+}$. Uptake $= 1/(2 \times 206) = 1/412$ mol/g. [1, 9]
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