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Question 30 (4 points) Groundwater defined by the following analysis is to be softened by lime-soda ash treatment. The targetmg mg Equivalent Weight of CaCO3 (g/EW) as Caco as species X L Equivalent Weight of Species (g/EW) Copyright The Mein Ins. Pe

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18) CO2 = 30 mg/ as co2 = 30 meque has coz 22 -1.36 mequinalent al con Ca²+ = 120mg/ as ca 2+ = 120 20 6 12. 48 12.2 HCO3 = 1According to flow Chart: Quantity of time required CO2, HCO,, Mg2+ 1-36 + 4+ 5.93] 750 mg/L as cacos 564-5 mg/ as calo]. 565

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