MWH’s Water Treatment
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Solution manual for MWH’s Water Treatment: Principles and Design Crittenden Trussell Hand Howe
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PROBLEM 2-1 Problem Statement - Given the following test results, determine the mole fraction of calcium (Ca2+). Concentration, Concentration, Cation mg/L Anion mg/L Ca2+ 40.0 HCO – 3 91.5 Mg2+ 12.2 2– SO4 72 Na+ 15.1 Cl– 22.9 K+ 5.1 – NO3 5.0 Solution 1. By definition, using Eq. 2-2, the mole fraction of Ca2+ is as follows. n 2+ x Ca Ca2+ n 2+ n 2+ n + n + HCO n 2- n - n - 3 4 3 2. Substituting in the MW for each of the constituents yield...
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