Equilibrium partial pressures of strong acids over concentrated saline solutions-II. HCl

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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  • S. L. Clegg
  • P. Brimblecombe


Original languageEnglish
Pages (from-to)117-129
Journal / PublicationAtmospheric Environment (1967)
Issue number1
Publication statusPublished - 1988
Externally publishedYes


Equilibrium partial pressures of HCl have been measured at 25°C over concentrated solutions containing the ions H+, Cl-, Mg2+, NH4 +, A13+, SO4 2-, ClO4 -, CH3SO3 -, and those of the alkali metals. Measurements agree closely with values predicted using a Henry's Law constant of 2.04 × 106mol2kg-2atm-1 for the reaction HCl(g)= H(aq.) + + Cl(aq.) -, and the Pitzer activity coefficient model. The following parameter values have been estimated for the model using the partial pressure and other thermodynamic data: θH,Rb, -0.0120; ψH, Rb, Cl, -0.012; θH,NH,-0.01; ψ4 H,NH, -0.009; ψ4,ClH,NH, -0.0104. © 1988.4,Br

Research Area(s)

  • activity coefficient, aerosols, alkali metals, aluminium, Henry's Law, Hydrochloric acid, partial pressure, Pitzer, saline solutions, solubility, space shuttle