JEE MAIN - Chemistry (2015 (Offline) - No. 4)
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?
2/309
1/412
1/103
1/206
ব্যাখ্যা
$$2$$ mole of water softner require $$1$$ mole of $$C{a^{2 + }}\,\,$$ ion
So, $$1$$ mole of water softner require $${1 \over 2}$$ mole of $$C{a^{2 + }}\,$$ ion
Thus, $${1 \over {2 \times 206}} = {1 \over {412}}mol/g\,\,\,$$ will be maximum uptake
So, $$1$$ mole of water softner require $${1 \over 2}$$ mole of $$C{a^{2 + }}\,$$ ion
Thus, $${1 \over {2 \times 206}} = {1 \over {412}}mol/g\,\,\,$$ will be maximum uptake