MgO－MgCl_2－H_2O溶液热化学研究  

Study on the Thermistry of Mgo-MgCl_2-H_2O Solution

作　　者：李武[1] 高世扬[1] 曾忠民[1] 夏树屏[1] 

机构地区：[1]中国科学院盐湖研究所

出　　处：《应用化学》1995年第4期36-39,共4页Chinese Journal of Applied Chemistry

基　　金：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

摘　　要：用精密量热仪对模拟合成的ＭｇＯ－２７．５６％ＭｇＣｌ_２－Ｈ_２Ｏ浓盐溶液进行恒沸盐酸－△Ｈ滴定。发现活性ＭｇＯ在２７．５６％ＭｇＣｌ_２－Ｈ_２Ｏ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。The enthalpy changes on mixing and reaction between synthetical MgO-27.56%MgCl_2-H_2O 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%MsCl_2-H_2O 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.

关 键 词：氯化镁 氧化镁 热化学 量热滴定法 

分 类 号：O642.54[理学—物理化学] O645.16[理学—化学]