Conductometric study of calcium(II), strontium(II), and barium(II) perchlorates in methanol-ethylene glycol mixtures.
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概要
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The ion-association constants, <I>K</I><SUB>1A</SUB>, of an ion pair, M<SUP>2+</SUP>ClO<SUB>4</SUB><SUP>−</SUP> (M=Ca, Sr, Ba), have been determined by conductometric measurements in methanol–ethylene glycol mixtures of 0, 20, 40, 60, 80, and 100 wt% of ethylene glycol at 5, 15, 25, 35, and 45 °C. The conductometric data were treated by an improved Fuoss and Edelson method. The thermodynamic functions of Δ<I>H</I><SUB>1A</SUB><SUP>\ominus</SUP> and Δ<I>S</I><SUB>1A</SUB><SUP>\ominus</SUP> have also been determined at 25 °C from the temperature dependence of <I>K</I><SUB>1A</SUB>. In 60–80 wt% of ethylene glycol the K<SUB>1A</SUB> values of these metal perchlorates are similar to each other, since the characteristics of individual metal ions are probably depressed by the strong solvations of those cations. The results are discussed while considering the cation solvation and structure of a bulk solvent.
- 公益社団法人 日本化学会の論文
著者
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OHE Hiroshi
Department of Physical and Analytical Chemistry, Tsukuba Research Laboratories, Eisai Co., Ltd.
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Ichimura Akio
Department Of Chemistry Faculty Of Science Osaka City University
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KITAGAWA Toyokichi
Department of Chemistry, Faculty of Science, Osaka City University
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Doe Hidekazu
Department Of Chemistry Faculty Of Science Osaka City University
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Kitagawa Toyokichi
Department of Chemistry Faculty of Education Kobe University
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Matoba Hiroyuki
Department of Chemistry, Faculty of Science, Osaka City University
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Ohe Hiroshi
Department of Chemistry, Faculty of Science, Osaka City University
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