水溶液表面形成的热力学量：IX. 铵盐的水溶液。
Thermodynamic quantities of surface formation of aqueous electrolyte solutions: IX. Aqueous solutions of ammonium salts.
机构信息
Faculty of Fisheries, Nagasaki University, 1-14 Bunkyou-machi, Nagasaki 852-8521, Japan.
出版信息
J Colloid Interface Sci. 2010 Apr 1;344(1):209-13. doi: 10.1016/j.jcis.2009.12.018. Epub 2009 Dec 16.
The properties of aqueous ammonium salt solutions at the air/water surface are presented. By comparison of the properties of ammonium halides solutions with those of sodium halide, we note a close similarity, which indicates that the increments in surface tension may be explained in relation to the hydration enthalpy of anions. We find that the behaviors of the salts with nitrate anions which are polyatomic are also explained by hydration enthalpy in the same way. On the other hand, salts with ammonium cations which are polyatomic show deviation from a monotonous relationship between the surface tension increments and the hydration enthalpies observed for alkali metal halides. These results can be explained by ion pair formation in the surface region.
本文介绍了空气/水表面上的水溶液铵盐的性质。通过比较卤化铵溶液与卤化钠溶液的性质，我们注意到它们之间的密切相似性，这表明表面张力的增加可以用阴离子的水合焓来解释。我们发现，具有多原子硝酸盐阴离子的盐的行为也可以用同样的方式用阴离子的水合焓来解释。另一方面，具有多原子铵阳离子的盐的表面张力增量与观察到的碱金属卤化物的水合焓之间的单调关系表现出偏差。这些结果可以通过表面区域中的离子对形成来解释。
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