Mathematics · Aptitude and Calculations
Calculate the temporary hardness of water (expressed in mg/L as CaCO3 equivalent) if it contains 7.3 mg/L of Mg(HCO3)2 and 16.2 mg/L of Ca(HCO3)2. (Molar masses: Mg(HCO3)2 = 146 g/mol, Ca(HCO3)2 = 162 g/mol, CaCO3 = 100 g/mol)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 125 mg/L
- 235 mg/L
- 320 mg/L
- 415 mg/L✓
Correct answer
15 mg/L
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