摘要
以实验为基础,对MnO2与浓H2SO4的反应进行了研究,其结果表明反应条件不同会有不同现象:MnO2与98%的H2SO4在383K时反应生成Mn(Ⅲ),强热(523K)后生成Mn(Ⅱ),当硫酸的浓度为12mol.L-1时不会出现歧化现象,硫酸的浓度为1.89mol.L-1时Mn(Ⅲ)被进一步转变为Mn(Ⅱ).作者还运用化学热力学方法进行了讨论,阐明了Mn(Ⅲ)发生歧化的原理及条件.
This paper has studied the resporse of concentrated H2SO4 and MnO2 based on a large number of experiments. The results indicate that there will be different results in different reaction conditions. MnO2and 98% H2SO4 ,response generates Mn（ Ⅲ ） at 383K, and after he strong heat generates Mn（ Ⅱ ）. Experiments also draw a conclusion,when the concentration of H2SO4 12mol· L^-1disproportionation does not begin to emerge, when the concentration of H2SO4 1.89mol · L^-1 it disproportionates fully. It has also discussed the use of chemical thermodynamics and theoretically expounded the principles disproportionation of Mn（ Ⅲ）.
出处
《西华师范大学学报（自然科学版）》
2007年第1期94-98,共5页
Journal of China West Normal University(Natural Sciences)
关键词
MNO2
浓H2SO4
歧化
化学热力学
平衡常数
Manganese（ Ⅳ ） oxide
concentrated sulphuric acid
disproportionation
chemical thermodynamics
equilibrium constant.
