Chemistry · Water and its Treatment
Which chemical substance is commonly used to remove the permanent hardness of water?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1CaSO4·2H2O
- 2Na2CO3·10H2O✓
- 3NaHCO3
- 4CaOCl2
Correct answer
Na2CO3·10H2O
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