The Activity Coefficient of Non-Electrolytes in Aqueous Salt Solutions from Solubility Measurements. The Salting-out Order of the Ions.

1927 ◽  
Vol 4 (3) ◽  
pp. 285-290 ◽  
Author(s):  
Merle. Randall ◽  
Crawford Fairbanks. Failey
Keyword(s):  
Activity Coefficient ◽  
Salt Solutions ◽  
Salting Out ◽  
Aqueous Salt Solutions

scholarly journals Experimental determination of Henry's law constants of difluoromethane (HFC-32) and the salting-out effects in aqueous salt solutions relevant to seawater

2017 ◽  
Vol 17 (12) ◽  
pp. 7495-7507
Author(s):  
Shuzo Kutsuna
Keyword(s):  
Henry's Law ◽  
Gas Stripping ◽  
Atmospheric Gases ◽  
Salt Solutions ◽  
Salting Out ◽  
Henry’S Law ◽  
Aqueous Salt Solutions ◽  
Water Equilibrium ◽  
Hoff Equation

Abstract. Gas-to-water equilibrium coefficients, KeqS (in M atm−1), of difluoromethane (CH2F2), a hydrofluorocarbon refrigerant (HFC-32), in aqueous salt solutions relevant to seawater were determined over a temperature (T) range from 276 to 313 K and a salinity (S) range up to 51 ‰ by means of an inert-gas stripping method. From the van't Hoff equation, the KeqS value in water, which corresponds to the Henry's law constant (KH), at 298 K was determined to be 0.065 M atm−1. The salinity dependence of KeqS (the salting-out effect), ln(KH∕KeqS), did not obey the Sechenov equation but was proportional to S0. 5. Overall, the KeqS(T) value was expressed by ln(KeqS(T))  =  −49.71 + (77.70 − 0.134  ×  S0. 5)  ×  (100∕T) + 19.14  ×  ln(T∕100). By using this equation in a lower-tropospheric semi-hemisphere (30–90 °S) of the Advanced Global Atmospheric Gases Experiment (AGAGE) 12-box model, we estimated that 1 to 4 % of the atmospheric burden of CH2F2 resided in the ocean mixed layer and that this percentage was at least 4 % in the winter; dissolution of CH2F2 in the ocean may partially influence estimates of CH2F2 emissions from long-term observational data of atmospheric CH2F2 concentrations.

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