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er yuan ruo suan suan shi yan rong ye zhong wei li nong du da xiao de bi jiao
Author(s): 
Pages: 75-78
Year: Issue:  1
Journal: Education in Chemistry

Keyword:  二元弱酸酸式盐亚硫酸氢钠碳酸氢钠草酸氢钠微粒浓度大小;
Abstract: 简述了二元弱酸酸式盐溶液中微粒浓度大小的定性分析方法,可知二元弱酸酸式盐均有3个临界点.推导得出二元弱酸酸式盐3个临界点微粒浓度的计算通式,认为临界点是二元弱酸酸式盐固有的属性.简述了二元弱酸酸式盐溶液从浓至稀时微粒浓度大小排序变化的规律,指出分析微粒浓度大小时必须说明溶液浓度.在常见二元弱酸酸式盐溶液浓度不是很小(大于0.01 mol·L-1)的情况下,离子浓度大小排序问题用弱酸根离子的电离与水解相互促进的定性分析就可以解决,这对中学化学教学具有一定的指导意义.
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