The solubility process of ionic salt was discussed with thermodynamic general law, and the general law of solubility was found out by analyzing about thermodynamic date.
According to the law (Henrry Lay) of gas dissolve: the solubility of any gas in water shall be direct ratio with partial pressure of the gas on interface of gas and water.
根据气体溶解定律(亨利定律)：任何气体在水中的溶解度与该气体在气、水界面上的分压力成正比。
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The solubility of hydrocarbon gas in some brand of polyethylene is calculated by Henry 's law to give nitrogen flow from purging bin in PE plant of different scale.