Question

# The molecular formula of a commercial resin used for exchanging ions in water softening is $$C_8H_7SO_3Na$$ $$($$molecular weight $$206)$$. What would be the maximum uptake of $$Ca^{2+}$$ ions by the resin when expressed in mole per gram resin?

A
1103
B
1206
C
1309
D
1412

Solution

## The correct option is A $$\displaystyle \frac {1}{412}$$The molecular weight of resin is $$206$$ g/mol.$$1$$ g of resin corresponds to $$\dfrac {1}{206}$$ moles. $$1$$ mole of calcium ions will displace $$2$$ moles of sodium ions from resin.$$1$$ mole of resin contains $$1$$ mole of sodium ions and can uptake upto $$0.5$$ moles of calcium ions.Hence, $$1$$ g of resin will uptake $$\dfrac {1}{206} \times 0.5 =\dfrac{1}{412}$$ moles of calcium ions.Chemistry

Suggest Corrections

0

Similar questions
View More

People also searched for
View More