9.23. Discuss the principle and method of softening of hard water by synthetic ion-exchange resins.
9.23. Discuss the principle and method of softening of hard water by synthetic ion-exchange resins.
9.23. Cation exchange resins have large organic molecule with SO3H group which are insoluble in water. Ion exchange resin (RSO3H) is changed to RNa on treatment with NaCl. The resin exchange Na+ ions with Ca2+ and Mg2+ ions present in hard water and make it soft.
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