Thermodynamic quantities of surface formation of aqueous electrolyte solutions X. Aqueous solution of 2:1 valence-type salts

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:356

Article

Matubayasi, Norihiro¹  Takayama, Ken¹  Ito, Ryoko¹  Takata, Ryusei¹ 

[1] Nagasaki Univ, Fac Fisheries, Nagasaki 8528521, Japan

关键词: Surface tension;    Electrolyte solutions;    Electrical double layer;   

DOI  :  10.1016/j.jcis.2011.01.007

来源: Elsevier

【 摘 要 】

The behaviors of a series of calcium halides and of alkali earth metal chlorides in the air/water surface region were studied in comparison with those of alkali metal halides by measuring the surface tension increments of solutions. The effect of salts with divalent cations on the surface tension increments is more pronounced than that of uni-univalent salts, but there are some similarities between these two types. It seems that the anions cause a marked effect on surface tension which is proportional to the magnitude of hydration in the bulk water. We also observed a decrease in the entropy change of surface formation with increasing concentration. The importance of an electrical double layer at the surface is discussed in relation to these surface tension increments. (C) 2011 Elsevier Inc. All rights reserved.

【 授权许可】

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