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  • 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 mol

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?

 

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\text { Moles of resin per gram }=\frac{1}{206} \approx 4.854 \times 10^{-3} mol

\text { Moles of } Ca^{2+}=\frac{1}{2} \times \frac{1}{206}=\frac{1}{412} \approx 2.427 \times 10^{-3} mol

2.43 \times 10^{-3} mol \text { of } Ca^{2+} \text { per gram of resim }

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Divya Sharma

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