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本文用平衡移动法在25℃水溶液中研究了硫氰酸铋(Ⅲ)配合物的组成。用改善了的guuMHpcun立方法测定了硫氰酸铋(Ⅲ)各级配合物的稳定常数和摩尔消光系数及其之间的关系。并用文献[6]的方法计算了溶液中各级配合物的组成百分数和配位体浓度的关系,考虑了各级配离子的百分组成的变化对摩尔消光系数的贡献。
In this paper, the composition of bismuth (III) thiocyanate complex was studied by the equilibrium shift method in 25 ℃ aqueous solution. The improved constant guuMHpcun method was used to determine the stability constants and molar extinction coefficients of all the complexes of bismuth thiocyanate (Ⅲ) and their relationship. The relationship between the composition percentage and the ligand concentration of the complexes at various levels in solution was calculated by the method of [6], and the contribution of the percentage composition of ions at various levels to the molar extinction coefficient was considered.