all expressed as CaCO3. Determine the chemical dosages required to soften this water as much as possible without removing magnesium. What will the final hardness be?

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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1-7. A water contains 200 mg/L Ca, 75 mg/L Mg, 180 mg/L HCO3, and 150 mg/L. CO₂,
all expressed as CaCO3. Determine the chemical dosages required to soften this
water as much as possible without removing magnesium. What will the final
hardness be?
1-8. If the water of Prob. 11-7 is to be softened to a final hardness of 85 mg/L as
CaCO, and is not to contain more than 25 mg/L. Mg as CaCO3, find the required
chemical dosages. Solve 11-7
Transcribed Image Text:1-7. A water contains 200 mg/L Ca, 75 mg/L Mg, 180 mg/L HCO3, and 150 mg/L. CO₂, all expressed as CaCO3. Determine the chemical dosages required to soften this water as much as possible without removing magnesium. What will the final hardness be? 1-8. If the water of Prob. 11-7 is to be softened to a final hardness of 85 mg/L as CaCO, and is not to contain more than 25 mg/L. Mg as CaCO3, find the required chemical dosages. Solve 11-7
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