EQUILIBRIUM PARTIAL PRESSURES OF STRONG ACIDS OVER CONCENTRATED SALINE SOLUTIONS .2. HCL

Equilibrium partial pressures of HCl have been measured at 25 degree C over concentrated solutions containing the ions H** plus , Cl** minus , Mg**2** plus , NH//4** plus , Al**3** plus , SO//4**2** minus , ClO//4** minus , CH//3SO//3** minus , and those of the alkali metals. Measurements agree closely with values predicted using a Henry's Law constant of 2. 04 multiplied by 10**6 mol**2 kg** minus **2 atm** minus **1 for the reaction HCl//(//g//) equals H** plus //(//a//q//. //) plus Cl// minus //(//a//q//. //), and the Pitzer activity coefficient model. The following parameter values have been estimated for the model using the partial pressure and other thermodynamic data: theta //H//, //R//b//, minus 0. 0120; psi // H//, //R//b//, //C//l//, minus 0. 012; theta //H//, //N//H//4//, minus 0. 01; psi //H//, //N//H//4//, //C//l//, minus 0. 009; psi //H//, //N//H//, //B//r//, minus 0. 0104.