17 The water with the composition shown in the following table is to be softened. Component CO2(aq) Ca2+ Concentration mg/L 14.5 110.0 Mg2+ 50.7 Na+ 75 HCO3 350 SO 85.5 16.2 pH 8.2 (a) What is the concentration (expressed in meq/L) of magnesium carbonate hardness in the water? (b) What is the concentration (expressed in meq/L) of magnesium noncarbonate hardness in the water? (c) What concentration (expressed in meq/L) of slaked lime [Ca(OH)2] must be added to remove the carbon dioxide?

17 The water with the composition shown in the following table is to be softened. Component CO2(aq) Ca2+ Concentration mg/L 14.5 110.0 Mg2+ 50.7 Na+ 75 HCO3 350 SO 85.5 16.2 pH 8.2 (a) What is the concentration (expressed in meq/L) of magnesium carbonate hardness in the water? (b) What is the concentration (expressed in meq/L) of magnesium noncarbonate hardness in the water? (c) What concentration (expressed in meq/L) of slaked lime [Ca(OH)2] must be added to remove the carbon dioxide?

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter11: Solutions And Colloids

Section: Chapter Questions

Problem 17E: Supersaturated solutions of most solids in water are prepared by cooling saturated solutions....

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