no . ion exchange resin method can remove permanent hardness.
in this method, the permanent hardness of water is removed by using resins. Ca++/Mg++ ions are exchanged with Clβ, SO4-2 ions are exchanged with anion exchange resin (RNH2OH). Demineralized water is formed in this process.
β 2RCOOH + Ca++ β (RCOO)2Ca + 2H+
β RNH2OH + Clβ β RNH2Cl + OHβ
β H+ + OHβ β H2O