中和之前尚未发生电离的部分，在与OH-反应之前呈分子状态存在，在中和过程中陆续电离发生中和反应。称该部分酸性物质为分子酸度。
本文借助最大重叠杂化轨道理论，研究了卤代甲烷系列分子的红外伸缩频率，基团电负性和质子酸度等分子性质与结构的关系。
The maximum overlap method was used to study the relationships the C-H stretching frequencies, group electronegativities and proton acidity properties and the molecular structure in the halomethanes.
结果表明，酸度、 温度、 浓度和复合比影响PAA/PAM的复合水溶液中大分子链的构象和流体力学体积，适度的氢键作用可以形成均相的复合溶液。
The results showed that formation and hydrodynamic volume of complex solution are influenced by the acidity, temperature, concentration and weight ratio of PAA/PVA complex solution.
本工作考察了分子筛裂化催化剂水蒸汽减活与表面酸度、表面积，和相对结晶度的关系。
The relation between steam deactivation and surface properties of zeolite - containing cracking catalyst was investigated.
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