Reconsider split-treatment softening of the water with the analysis given in Problem. Use the alternate method of solution given in Example 11.9. How does this finished water bar graph compare with the finished water bai graph determined in Problem? (Note: The equilibrium concentrations for C03= and HC03- ions determined in these calculations are only approximate, in actual chemical reactions, the relationship of these ions depends on final pH.)
Problem:
Consider the split-treatment softening of water described by the analysis below. Use the criteria for the finished water given in Example 11.8. Draw a bar graph for the finished water after second-stage treatment with soda ash, sedimentation, and final filtration.
CO2 = 15 mg/l as CO2 | HCO3- = 200 mg/l asCaCO3 |
Ca2+ = 60 mg/l | SO42- = 96 mg/l |
Mg2+ = 24 mg/l | Cl- = 35 mg/l |
Na+ = 46 mg/l |
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