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14 votes
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Water hardness is the measure of the concentrations of __________ and __________ dissolved in the water sample.

User Jose Diaz
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1 Answer

18 votes
18 votes

Answer:

Calcium and Magnesium

Step-by-step explanation:

Dissolved calcium (Ca++) and magnesium (Mg++) are the only two divalent cations found at appreciable levels in most waters.

User Tom Rutchik
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