The molecular formula of a commercial resin used for exchanging ions in water softening is $${C_8}{H_7}SO_3^ - N{a^ + }$$ $$\left( {Mol.\,wt.\,206} \right).$$ What would be the maximum uptake of $$C{a^{2 + }}$$ ions by the resin when expressed in mole per gram resin?
A.
$$\frac{2}{{309}}$$
B.
$$\frac{1}{{412}}$$
C.
$$\frac{1}{{103}}$$
D.
$$\frac{1}{{206}}$$
Answer :
$$\frac{1}{{412}}$$
Solution :
$$2$$ mole of water softner require $$1$$ mole of $$C{a^{2 + }}$$ ion $$1$$
So, $$1$$ mole of water softner require $$\frac{1}{2}$$ mole of $$C{a^{2 + }}$$ ion
Thus, $$\frac{1}{{2 \times 206}} = \frac{1}{{412}}{\text{moI/g}}$$ will be maximum uptake
Releted MCQ Question on Inorganic Chemistry >> S - Block Elements
Releted Question 1
A substance absorbs $$C{O_2}$$ and voilently reacts with water. The substance is