Verified Solution • 2025–26 Session moderate

QJEEM15Ch3d98: JEE Main 2015 Chemistry - Class 11 JEEM15Ch3d98 Solution: The molecular formula of a commercial resin used for exchanging …

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

Multiple Choice Options

  • A 2/309
  • B 1/412
  • C 1/103
  • D 1/206

Step-by-Step Verified Solution

22 mole of water softner require 11 mole of Ca2+  C{a^{2 + }}\,\, ion

So, 11 mole of water softner require 12{1 \over 2} mole of Ca2+ C{a^{2 + }}\, ion

Thus, 12×206=1412mol/g   {1 \over {2 \times 206}} = {1 \over {412}}mol/g\,\,\, will be maximum uptake

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