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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//3009`

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+)) 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
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