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准确把握微溶物质的性质
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作者 文振邦 《中学化学》 2004年第2期11-12,共2页
1.对于微溶物质,不论其溶液是否饱和都是稀溶液。理由因微溶物质溶解度小,室温时,100g水中能溶解微溶物质的质量小于1g。所以,即使达到饱和的微溶物质溶液,其浓度也不大,其不饱和溶液则更稀了。
关键词 微溶物质 性质 溶解度 浓度 离子方程式 中学 化学
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微溶性物质不能忽视
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作者 缪徐 《中学课程辅导(初三版)》 2003年第12期41-41,共1页
与常见易溶、难溶物质相比,微溶性物质似乎不那么重要,因为在书写化学方程式中的生成物时不知是否应视为沉淀?在各类考试命题时,也往往回避之。但这并不能说明微溶物质不重要,更不能被忽视,本文仅用Ca(0H)2、CaS02、Ag7S04的微溶性来解... 与常见易溶、难溶物质相比,微溶性物质似乎不那么重要,因为在书写化学方程式中的生成物时不知是否应视为沉淀?在各类考试命题时,也往往回避之。但这并不能说明微溶物质不重要,更不能被忽视,本文仅用Ca(0H)2、CaS02、Ag7S04的微溶性来解释几个重要问题,以说明以上观点。 展开更多
关键词 微溶物质 化学方程式 氢氧化钙 初中 化学 知识点
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Modelling Simultaneous Transport of Bioreactive Solutes and Microorganisms in Porous Media
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作者 Y.TAN LIZHENGAO 《Pedosphere》 SCIE CAS CSCD 1998年第2期149-154,共6页
Recent years have seen the development of a number of mathematical models for the description of the simultaneous transport of microorganisms and bioreactive solutes in porous media. Most models are based on the adve... Recent years have seen the development of a number of mathematical models for the description of the simultaneous transport of microorganisms and bioreactive solutes in porous media. Most models are based on the advection dispersion equation, with terms added to account for interactions with the surfaces of the solid matrix, transformations and microbial activities. Those models based on the advection dispersion equation have all been shown to represent laboratory experimental data adequately although various assumptions have been made concerning the pore scale distribution of bacteria. This paper provides an overview of the recent work on modelling the transport and fate of microorganisms and bioreactive solutes in porous media and examines the different assumptions regarding the pore scale distribution of microorganisms. 展开更多
关键词 bioreactive solutes MICROORGANISMS porous media transport
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