用pH玻璃电极法测定弱酸/碱的浓度常数

DETERMINATION OF CONCENTRATION CONSTANTS FOR WEAK ACID OR/AND WEAK BASE BY USING pH GLASS ELECTRODE

研究了用ｐＨ玻璃电极电位滴定法测定弱酸／碱浓度常数的实验方法．部分弱酸／碱ｐＫｃ的测定结果与文献值比较，相对误差基本在５％以内．离子强度不同时，测定ｐＫｃ的相对标准偏差小于１％．

An experimental procedure on the determination of concentration constants for weak acid or/and weak base were presented by potentiometer titration with pH glass electrode. Relative errors of concentration constants for weak acid and weak base between determining value and reference value are below 5%. Standard deviations of determining value for pK c in different ionic intensity are below 1%.