Question: 3 . ( 2 ) Forty ( 4 0 ) mg / L of Ca 2 + and 6 0 mg / L of Mg

3.(2) Forty (40) mg/L of Ca2+ and 60 mg/L of Mg2+ are dissolved in 0.5L of water. What is the total hardness of the solution expressed in mg/L as CaCO3?

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