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Unformatted text preview: does the NH3(aq) conc’n exceed 1 mg/L? 9.24 NH 10
4
= 1 TOTNH 3 109.24 H NH 4 =
H TOTNH 3 109.24 H NH3 TOTNH 3 Generically: Fraction as given species 1.0
0.9
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3 HAc 4 5 Ac 6 HOCl 7
pH OCl 8 9 NH4+ 10 NH3 11 12 Reactions: Equilibria: H2CO3 Speciation H 2 CO3 HCO3 H HCO3 = H Ka2 2 CO3 2 CO3 H 1010.3
K
a2 = HCO3 2
HCO3 CO3 H HCO 3 H 106.3
K a1 = H 2CO3 H H
2 CO3 = K a1 HCO3 2
Mass Balance: TOTCO3 = H 2 CO3 HCO3 CO3 3 2 CO3 H 1010.33
K
a2 = HCO3 H 2CO3 HCO 3 H 106.35
K a1 = Combining Reactions and Equilibria
3 H CO HCO H 2 2
3...
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This note was uploaded on 02/05/2014 for the course CEE 357 taught by Professor Benjamin during the Winter '12 term at University of Washington.
 Winter '12
 Benjamin
 Equilibrium, Pk

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