The experimental results showed that the compostition and the formation constants of lead fluoride complex ions are PbF~+, PbF_2, PbF_~-3,PbrF_4~(2-),β_1=5．0，β_2=1．8×10~2， β_3=2．6×10~3，β_4=1．2×10~3, respectively for lead at the conentration of 2×10~(-7) mol/L and pH = 8.

The compositions and formation constants of cadmium fluoride complex ions are CdF +,CdF 2, β 1=2.

UV-Spectrophotometric determination of the stability constant of electroactive materials;

UV-spectrophotometric determination of stability constant of EV-SCN~- ion-pairs;

Study on complex stability constants by computer fitting complex formation curve;

Determination of the stability constants of complexing between the water-soluble-organic-matter of peat and the metal ions;

Determination of dissociation constants of arsenazo and stability constants of lanthanum arsenazo complexes in aqueous solution;

In the present work, the stability constants of complexes of rare-earth compounds with glycin RE(Gly)Cl3·3H2O(RE= La, Pr, Sm, Eu, Dy, Ho, Er, Lu, Y) were determined by potentioetric titration at 20 ℃.

Determination of Stable Constant about Copper Sulfo Salicylic Acid;

This paper is a research on the reaction product C_o[H_(g)(SCN)_(4)] according to the stable constants of complex and three designed experiments.

1)℃, the purity of the product recrystallized and the stable constants of trimesic acid with the rare earth ions was determinated with potentiometric titration.