Explain synthetic resins method.
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Posted by Divya Tripathy 6 years, 6 months ago
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Yogita Ingle 6 years, 6 months ago
Synthetic resins method is a method used for removing permanent hardness of water. In this method ion exchange resins (RSO3H) is changed to RNa by treating it with NaCl. Then, RNa exchanges Na+ ions with Ca2+ and Mg2+ ions present in hard water and as a result, hard water is softened.
2RNa + M2+ → R2M + 2Na+
R2M + 2 NaCl → 2RNa + MCl2
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