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Q.

The molecular formula of a commercial resin used for exchanging ions in water softening is C10H9SO3Na(mol.wt=232).  What would be the maximum uptake of Ca2+  ions by the resin when expressed in mole per gram resin?

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a

1116

b

1232

c

2309

d

1464

answer is D.

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Detailed Solution

2C10H9SO3¯Na+Ca2+(C10H9SO3)2Ca+2Na

2 mole             1 mole 

2×232         

=464g              1 mole
1g             1464moleg1    of resin

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