The molecular formular of a commerical resin used for exchanging ions in water softening is C_(8)H_(7)SO_(3)Na(Mol . Wt. of 206). What would be the maximum uptake of Ca^(2+) ions by the resin when expressed in mole per gram resin ?

The molecular formular of a commerical resin used for exchanging ions

1.	The molecular formular of a commerical resin used for exchanging ions in water softening is C_(8)H_(7)SO_(3)Na(Mol . Wt. of 206). What would be the maximum uptake of Ca^(2+) ions by the resin when expressed in mole per gram resin ?
Answer» `2//3009` `1//412` `1//103` `1//206` Solution :`UNDERSET(2xx206=412 g)underset(2 "mol")(2C_(8)H_(7)SO_(3)^(-)Na^(+)) + underset("1 mol")(Ca^(2+)) to ` `(C_(8)H_(7)SO_(3)^(-))_(2)Ca^(2+)+Na^(+)` `therefore ` 1 mole of `Ca^(2+)=412` g of resin or maximum uptake of `Ca^(2+)` ions by the resin `=(1 mol)/(412g)=(1)/(412) ` mol/g