摘要
pH值是溶液酸碱性的量度。首先定义为氢离子浓度负对数。在使用过程中发现此值与实验值有一定的偏差,特别是浓度偏大时,误差就更大。因此,为精确描述pH值,就须用活度来代替浓度,从而使pH值更接近于实验值。
The PH value is a measurement of acid and alkali. It is firstly defined as minus logarithm of PH indicator. In the application process, the writer of this paper finds that there is some deviation between the value and experimental value, especially when the concentration is great. Therefore, to precisely describe PH value, it is necessary to replace concentration with flexibility so that the PH value is closer to the experimental value.
出处
《涪陵师范学院学报》
2005年第5期95-96,共2页
JOurnal of Fuling Teachers College
关键词
PH值
活度
活度系数
离子强度
PH value
degree of flexibility
coefficient of flexibility
intensity of ion
