Question

Can anyone explain me the reaction and also the above lines (in attachment)..?

Answer 1

⭐️⭐️⭐️⭐️ SELINA ICSE CONCISE CHEMISTRY ; CHAPER 3 : WATER ; PART-I FOR CLASS IX ⭐️⭐️⭐️⭐️

◆ The reactions involved are the reactions for removal of permanent hardness.
◆ When CaSO4 (Sulphates of calcium) reacts with Sodium carbonate (Na2CO3), CaCO3 (Calcium carbonate) and Na2SO4 (Sodium sulphate) are formed.
◆ THIS REACTION IS A DISPLACEMENT REACTION.

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