The Effect of the Pressure on the Electrical Conductivity of Zinc Sulfate in Water
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概要
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The electrical conductivity of ZnSO<SUB>4</SUB> in water was measured at high pressures up to 3000 kg/cm<SUP>2</SUP> and at 25 °C. The dissociation constant of the ion pair (<I>K</I><SUB>m</SUB>) increased with an increase in the pressure. The volume change (<I>ΔV</I>°) accompanying the dissociation was −8.0±0.5 ml/mol at 25 °C. The distance of the closest approach (å) of the ion pair, calculated using the observed <I>K</I><SUB>m</SUB> value and the theoretical equation of Bjerrum, increased with an increase in the pressure. In view of these <I>ΔV</I>° and a values, the ion pair of ZnSO<SUB>4</SUB> was assumed to be of the solvent-separated type. It was also concluded that the number of water molecules separating the ions constituting an ion pair increases with an increase in the pressure.
- 公益社団法人 日本化学会の論文
著者
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Suzuki Keizo
Department Of Chemistry Faculty Of Science And Engineering Ritumeikan University
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Taniguchi Yoshihiro
Department Of Applied Chemistry Faculty Of Science And Engineering Ritsumeikan University
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Watanabe Takashi
Department Of Applied Physics Tohoku University
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