Chemistry · Water Chemistry
Which one among the following determines the hardness index of fresh water?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The molar ratio of D2O to H2O in fresh water
- 2The pH value of fresh water measured at room temperature and at one atmospheric pressure
- 3Difference of the pH value of the fresh water with respect to sulphuric acid
- 4Total concentration of Ca2+ and Mg2+ ions in the fresh water✓
Correct answer
Total concentration of Ca2+ and Mg2+ ions in the fresh water
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