中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (4): 36-39.

• 研究论文 • 上一篇    下一篇

MgO-MgCl2-H2O溶液热化学研究

李武, 高世扬, 曾忠民, 夏树屏   

  1. 中国科学院盐湖研究所, 西宁 810008
  • 收稿日期:1994-10-31 修回日期:1995-02-09 出版日期:1995-08-10 发布日期:1995-08-10
  • 基金资助:
    中国科学院基础研究重点课题,国家自然科学基金资助课题

Study on the Thermistry of Mgo-MgCl2-H2O Solution

Li Wu, Gao Shiyang, Zeng Zhongmin, Xia Shuping   

  1. Institute of Salt Lakes, Chinese Acadelny of Sciences, Xining 810008
  • Received:1994-10-31 Revised:1995-02-09 Published:1995-08-10 Online:1995-08-10

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摘要： 用精密量热仪对模拟合成的MgO-27.56% MgCl2-H2O浓盐溶液进行恒沸盐酸-△H滴定.发现活性MgO在27.56% MgCl2-H2O溶液中不同浓度时表现出不同的结果,结合该浓盐溶液的恒沸盐酸-pH滴定结果对反应机制进行了初步探讨.

关键词: MgO, 氯化镁水溶液, 恒沸盐酸反应, 反应机制, 量热滴定法

Abstract: The enthalpy changes on mixing and reaction between synthetical MgO-27.56%MgCl2-H2O solution and azeotropic hydrochloric acid have been studied with a precisecalorimeter. It is shown that the active magnesium oxide has different thermochemical be-havior in 27. 56%MsCl2-H2O solution. When the concentration of MgO is≤0.8914mmol(50mL solution)the molar enthalpy of MgO is almost identical small than when the concen-tration is higher. A mechanism for the reaction has been proposed in combination the resultswith that obtained in azeotropic hydrochloric acid-pH titration.

Key words: MgO, aqueous magnesium chloride solution, azeotropic hydrochloric acid reac-tion.reaction mechanism.calorimetric titration

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