It has been a good result by using PH-electrometric titration to determine stable constant about copper sulfo salicylic acid complex ion, in comparison with reference data.
本文采用pH 电位滴定法测定磺基水杨酸铜络离子的稳定常数，得到了比较准确的结果（与文献值比较）。
2
The article discussed the changing relation between total alkalinity content and titration equivalence point and changed situation of methyl orange in the different PH value color.
本文讨论了水样中总碱度含量与滴定等当点的变化关系和甲基橙在不同PH值时的颜色变化情况。
3
In mixed weak acid titration, calculation of PH of stoichiometric point, calculation of end point error and stepwise titration criterion are the must specific problems.