General Knowledge - General Science - Discussion
Discussion Forum : General Science - Elements and Metals (Q.No. 32)
32.
Permanent hardness of water may be removed by the addition of
Discussion:
12 comments Page 2 of 2.
Mayuresh sunny said:
1 decade ago
Thats is why sodium carbonate is also used for detergents.
Abinaya said:
1 decade ago
Permanent hardness is due to magnesium or calcium chloride. Therefore by the addition of sodium carbonate it is removed in the form of sodium chloride.
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