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.
出处
《应用化学》
CAS
CSCD
北大核心
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
关键词
氯化镁
氧化镁
热化学
量热滴定法
MgO,aqueous magnesium chloride solution,azeotropic hydrochloric acid reac-tion.reaction mechanism.calorimetric titration
