Question

What is the cause for permanent Hardness in water and How do you soften it by ion – exchange

method.​

Answer 1

Answer:

Hope it helps you dear

Explanation:

Ion Exchange Resin Method:

In this method, the permanent hardness of water is removed by using resins. Ca++/Mg++ ions are exchanged with Cl–, SO4-2 ions are exchanged with anion exchange resin (RNH2OH). Demineralized water is formed in this process.