"Not in mg/L.. 6-13. Determine the lime and soda ash dose, in mg/L as CaCO3, to soften the following water to a final hardness of 80.0 mg/L as CaCO3. The ion concentrations reported below are all mg/L as CaCO3. Ca² = 120.0 Mg2+= 30.0 Last m mal Jan 25 HCO3 = 70.0 CO₂ = 10.0 Answers: Total lime addition = 100 mg/L as CaCO, Total soda ash addition = 40 mg/L as CaCO,

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