Hydrogen And Its Compounds Question 220
Question: The molecular formula of a commercial resin used for exchanging ions in water softening is $ C_8H_7SO_3Na $ (mol. Wt. 206). What would be the maximum uptake of $ C{a^{2+}} $ ions by the resin when expressed in mole per gram resin-
Options:
A) $ \frac{1}{103} $
B) $ \frac{1}{206} $
C) $ \frac{2}{309} $
D) $ \frac{1}{412} $
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Answer:
Correct Answer: D
Solution:
[d] 1g of $ C_8H_7SO_3Na=\frac{1}{206}mol $
$ 2C_8H_7SO_3NA+C{a^{2+}}\to {{(C_8H_7SO_3)}_2}Ca+2N{a^{+}} $ 2 mol of resin requires 1 mol $ 2\times 206g $ Of resin requires 1 mol 1 g of resin requires $ \frac{1}{412} $ mol
BETA
