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The name of the salt used to remove permanent hardness of water is

Acids, Bases and Salts (10)

The name of the salt used to remove permanent hardness of water is:

  1. Sodium hydrogen carbonate (NaHCO3)
  2. Sodium chloride (NaCl)
  3. Sodium carbonate decahydrate (Na2CO3.10H2O)
  4. Calcium sulphate hemihydrate (CaSO4. $\frac{1}{2}$H2O)

Answer

(C) Sodium carbonate decahydrate (Na2CO3.10H2O)

  • Exam Year: 2023
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