The name of the salt used to remove permanent hardness of water is:
A. Sodium hydrogen carbonate (NaHCO3)
B. Sodium chloride (NaCl)
C. Sodium carbonate decahydrate (Na2CO3.10H20)
D. Calcium sulphate hemihydrate (CaSO4.1/2H20)
Answer:C
The name of the salt used to remove permanent hardness of water is:
A. Sodium hydrogen carbonate (NaHCO3) B. Sodium chloride (NaCl) C. Sodium carbonate decahydrate (Na2CO3.10H20) D. Calcium sulphate hemihydrate (CaSO4.1/2H20)