Science · Chemistry
The permanent hardness of water is primarily caused by the presence of soluble:
- 1Chlorides and sulfates of calcium and magnesium✓
- 2Bicarbonates of sodium and potassium
- 3Carbonates of sodium and potassium
- 4Bicarbonates of calcium and magnesium
Correct answer
Chlorides and sulfates of calcium and magnesium
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