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The molecular formula of a commercial re...

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

A

`(2)/(309)`

B

`(1)/(412)`

C

`(1)/(103)`

D

`(1)/(206)`

Text Solution

Verified by Experts

The correct Answer is:
B
`underset((2xx206=412 g))underset(2 mol)(2C_(8)H_(7)SO_(3)^(-)Na^(+))+underset(1 mol)(Ca^(2+))rarr (C_(8)H_(7)SO_(3)^(-))_(2)Ca^(2+)+2Na^(+)`
1 mol of `Ca^(2+)-=412 g` of resin
Maximum uptake of `Ca^(2+)` ions by the resin
`= (1 mol)/(412 g)=(1)/(412)` mol/g
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