Abstract: Attempting to reduce the loss of the products F_(22) and C_2F_4 during washing processing, the solubilities of the two given compounds in water, aqueous HCl and the solution of NaCl have been studied respectively. The solubilities were determined with the use of a micro gas absorbing apparatus. Experimental results show that the "salting out" effect produced by the presence of these electrolytes. Working with the experimental data, further, it is possible to calculate the Henry's constants of F_(22) and C_2F_4 in the electrolytic solutions and the salting out coefficients and to get the satisfactory correlations from these data in polynomial forms with respect to temperature and the electrolytic concentrations. Various other thermodynamic constants were also obtained. By a molecular thermodynamic model for gas solubility, the molecular parameters for these gases have been estimated by proper fitting of the experimental data.