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A water has an alkalinity of 250 mg/L as CaCO3. The Ca2+ concentration is 180 mg/L as the ion and Mg2+ concentration is 50 mg/L

A water has an alkalinity of 250 mg/L as CaCO3. The Ca2+ concentration is 180 mg/L as the ion and Mg2+ concentration is 50 mg/L as the ion. The pH is 8.1. Equivalent weight of CaCO3 = 50. The molecular weights of calcium and magnesium are 40 and 24 respectively. Find: 1) total hardness 2) carbonate hardness

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