Softening ion-exchange resins are used to replace the magnesium and calcium ions found in hard water
with sodium ions.
This resin is a polystyrene-gel type strong acid cation resin for the treatment of foodstuffs, beverages and potable waters.
All ion exchange resins require periodic regeneration with a salt solution to operate at optimum efficiency.
The resin can be recharged by washing it with a solution containing a high concentration of sodium ions
(e.g. it has large amounts of common salt (NaCl) dissolved in it). The calcium and magnesium ions migrate off the resin,
being replaced by sodium ions from the solution until a new equilibrium is reached. The salt is used to recharge an
ion-exchange resin which itself is used to soften the water.
Polymer Structure - Polystyrene-DVB
Functional Group - R-SO3-
Ionic Form - Na+
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