Chemistry · Environmental Chemistry
What is the permanent hardness of water (expressed in mg/L as CaCO3 equivalent) if it contains 46 mg/L Mg(HCO3)2, 36 mg/L Ca(HCO3)2, 30 mg/L MgSO4, 24 mg/L CaSO4, 28 mg/L CaCl2, and 10 mg/L NaCl? (Molar masses: MgSO4 = 120, CaSO4 = 136, CaCl2 = 111, CaCO3 = 100)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1121.5 mg/L
- 233.9 mg/L
- 353.7 mg/L
- 467.8 mg/L✓
Correct answer
67.8 mg/L
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