Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Effects of Pressure on r-Function of KCl in Water-Methanol Systems

물-에탄올 混合溶媒에서 KCl의 r-函數에 대한 壓力의 效果

  • Jong Jae Chung (Department of Chemistry, Kyungbook National University) ;
  • Hag Sung Kim (Department of Chemistry, Kyungbook National University) ;
  • Oh Ryong Kwon (Department of Chemistry, Kyungbook National University) ;
  • Seong Keuck Cha (Department of Chemistry, Kyungnam National University)
  • 정종재 (慶北大學敎 自然科學大學 化學科) ;
  • 김학성 (慶北大學敎 自然科學大學 化學科) ;
  • 권오룡 (慶北大學敎 自然科學大學 化學科) ;
  • 차성극 (慶南大學敎 自然科學大學 化學科)
  • Published : 19930300
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Abstract

The effect of pressure on solvation of potassium chloride was studied by the density and viscosity measurements of water-methanol systems and the conductance measurements of KCl in this systems. These were used to calculate the r-function of KCl. It was found that the r-function of KCl which is 0.613 at 25$^{\circ}C$ and 1 bar in water was continuously decreased to the minimum point and enhanced with increasing the composition of methanol. At high pressure, the r-function of KCl was similar to that of normal pressure. But r-function decreased with increasing pressure at the specific component of methanol.

물-메탄올 혼합용매에서 KCl의 용매화에 미치는 압력의 효과를 알기 위하여 여러 가지 압력하에서 물-메탄올 혼합 용매의 밀도와 점성도 및 이 혼합용매하에서 KCl의 무한희석시 당량 전도도를 측정하여 r-함수를 구하였다. 25$^{\circ}C$, 1기압에서 KCl의 r-함수는 물에서는 0.613이나 메탄올의 양이 증가함에 따라 감소하다가 다시 증가하였으며 고압하에서도 대기압에서와 비슷한 변화의 경향을 보였다. 일정 압력하에서는 메탄올의 양이 증가함에 따라 r-함수가 감소하다가 다시 증가하였으나, 일정 용매조성에서 압력이 증가하면 r-함수는 감소하였다.

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