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Please help with questions from 13-17. Thank you! The eight-step Lime-Soda softening process: 1. CO2+Ca(OH)2 2. Ca2++2HCO3+Ca(OH)2 2CaCO3(s)+2H2O 3. Ca2++SO42+Na2CO3 CaCO3(s)+2Na++SO42 4. Mg2++2HCO3+2Ca(OH)2 2CaCO3(s)+Mg(OH)2(s)+2H2O 5.
Please help with questions from 13-17. Thank you!
The eight-step Lime-Soda softening process: 1. CO2+Ca(OH)2 2. Ca2++2HCO3+Ca(OH)2 2CaCO3(s)+2H2O 3. Ca2++SO42+Na2CO3 CaCO3(s)+2Na++SO42 4. Mg2++2HCO3+2Ca(OH)2 2CaCO3(s)+Mg(OH)2(s)+2H2O 5. Mg2++SO42+Ca(OH)2+Na2CO3 CaCO3(s)+Mg(OH)2(s)+2Na++SO42 6. 2HCO3+Ca(OH)2 CaCO3(s)+CO32+2H2O 7. Ca2++2OH+CO2 CaCO3(s)+H2O 8. CO32+CO2+H2O 2HCO3 A water sample contains the following concentrations: CO2Ca2+Mg2+Na+K+ALK2SO42Cl=4mg/L=52mg/L=12mg/L=70mg/L=13mg/L=210mg/L=31mg/L=75mg/L 013 (part 4 of 9) 5.0 points Step 2. What is the concentration of lime added (meq/L) for calcium carbonatehardness (meq/L)? Answer in units of meq/L. 014 (part 5 of 9 ) 5.0 points Step 3. What is the concentration of soda added (meq/L) for calcium non-carbonate hardness? Answer in units of meq/L. 015 (part 6 of 9) 5.0 points Total Lime. Including the addition of an excess of 0.8meq/L in Step 6, what is the total concentration (mg/L) of slaked lime (Ca(OH)2) added in Steps 1 through 6 ? Answer in units of mg/L. 016 (part 7 of 9) 5.0 points For a plant flow rate of 32 MGD, what is the total mass rate (lb/day) of slaked lime (Ca(OH)2) added? Answer in units of lb/day. 017 (part 8 of 9) 5.0 points For a plant flow rate of 32MGD, what is the total mass rate (lb/day) of soda (Na2CO3) added? Answer in units of lb/ dayStep by Step Solution
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