Ionic partial molar volumes of alkali halides in methanol as evaluated from the sedimentation potentials.
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概要
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Sedimentation potential (SP) measurements were carried out for solutions of alkali halides dissolved in methanol. With the SP data thus obtained, the partial molar volumes <I>V</I><SUB>2</SUB><SUP>∞</SUP> of alkali halide MX, <I>V</I><SUB>2</SUB><SUP>∞</SUP> (MX), were divided into cationic <I>V</I><SUB>2</SUB><SUP>∞</SUP> (M<SUP>+</SUP>) and anionic <I>V</I><SUB>2</SUB><SUP>∞</SUP> (X<SUP>−</SUP>) parts. The ionic partial molar volumes evaluated showed a reasonable agreement with each other. These values of <I>V</I><SUB>2</SUB><SUP>∞</SUP> (M<SUP>+</SUP>) and <I>V</I><SUB>2</SUB><SUP>∞</SUP> (X<SUP>−</SUP>) are numerically compatible with those reported earlier by Kawaizumi and Zana using the ultrasonic vibration potential method and those given more recently by French and Criss based on the apportionment of the estimated <I>V</I><SUB>2</SUB><SUP>∞</SUP> value for the large complex [Ph<SUB>4</SUB>PBPh<SUB>4</SUB>] (<I>J. Solution Chem.</I>, <B>11</B>, 625 (1982).) The magnitude of the concentration dependence of SP was evaluated theoretically by expressing the apparent molar volume, the transport number, and the density of a solution as functions of the solute concentration.
- 公益社団法人 日本化学会の論文
著者
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Nomura Hiroyasu
Department Of Chemical Engineering Faculty Of Engineering Nagoya University
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Kawaizumi Fumio
Department of Chemical Engineering, Nagoya University
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Hirakawa Hiromitu
Department of Electronics, Faculty of Engineering, Kagoshima University
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