Surface ChemistryHard
Question
Softening of hard water is done using sodium aluminium silicate (zeolite). The causes :
Options
A.adsorption of Ca2+ and Mg2+ ions of hard water replacing Na+ ions.
B.adsorption of Ca2+ and Mg2+ ions of hard water replacing Al3+ ions
C.both (A) and (B)
D.none of these
Solution
Softening of hard water : Ion exchange resins used for softening of hard water is based upon selective and competive adsorption of ions on resins.
Na2Z + Ca+2 → CaZ + 2 Na+
The organic polymers containing groups like -COOH, -SO3H and -NH2 etc. possess the property of selective adsorption of ions from solution. These are quite useful in the softening of water.
Na2Z + Ca+2 → CaZ + 2 Na+
The organic polymers containing groups like -COOH, -SO3H and -NH2 etc. possess the property of selective adsorption of ions from solution. These are quite useful in the softening of water.
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