低浓度弱酸（碱）溶液pH值的对数图解法  

FINDING pH OF WEAK ACID AT VERY LOW CONCENTRATION USING LOGARITHMIC DIAGRAM

作　　者：王正工[1] 徐书绅[1] 

机构地区：[1]四平师范学院,长春师范学院

出　　处：《松辽学刊（自然科学版）》1994年第3期9-11,共3页Songliao Journal (Natural Science Edition)

摘　　要：通过应用对数浓度图，可以得出弱酸或弱碱溶液的ｐＨ值．但是当弱酸或弱碱的浓度非常低时，有必要划一条校正线，此校正线表示ｌｇ（［Ａ＋］＋［ＯＨ－］）的．本文报导了一个用于低至１０－８ｍｏｌ／Ｌ醋酸溶液的具体解法，所得结果与代数法完全一致．By the use of logarithmic concentration diagram, we can find the pH of the solutions of weak acid or weak base. But, when the concentration of the weak acid or base is very low, it is necessary to drow a calibration line, which expresses the value of ig ([A-] + [OH-]. The present paper reports a concrete method for 10-8 mol/L acetic acid and the result thus obtained is corresponding to that solved numerically.

关 键 词：PH值 浓度对数图 酸 溶液 

分 类 号：O645.1[理学—物理化学]