【摘要】 作者曾提出用回归分析的方法确定 Debye-Hückel 方程中参数的数值,由此确定的pK_c^o与其它文献的比较使这种方法得到了支持。为了进一步完善这种方法,作者将 DK_c～Ⅰ实验曲线按特征划分为四个区间,分别做回归分析而观察到推广的 Debye-Hücke l方程可能存在着—个临界值Ⅰ_o,低强度回归的上限不得低干Ⅰ_o,高强度回归的下限不得高于Ⅰ_o。这一现象在以 Ca（NO₃）₂,Sr（NO₃）₂或 Al（NO₃）₃做支持电解质的实验中均被观察到。本文对此作更多还原

【Abstract】 A method to determine the value of parameter a of Debye-Hückel Equation is fur- nished and pK_c^o is determined.Compared with the results of other literatures,this meth- od is supported.To further complete the method according to the characters of the experiment curve pK_c-I,the whole curve is divided into four regions and the regres- sion analyses are made separately.Thus,a critical value I_o of ion strength I is obser- ved.That is,the up-limit of regression region I mustn’t be lower than I_o,and the down-limit of regression region Ⅱ mustn’t be higher than I_o.This phenomenon is ob- served in experiments with Ca（NO₃）₂,Sr（NO₃）₂ and Al（NO₃）₃ as the support electro- lyte and some qualitative explanations about it are made.更多还原