锑(Ⅲ)—氯和锑(Ⅲ)—羟基络合物的研究

来源期刊：中南大学学报(自然科学版)1981年第3期

论文作者：龚竹青 陈白珍 曹再珍

文章页码：72 - 78

关键词：生成常数； 络合物组成； 半波电位； 极谱法； 羟基络合物； 电位法； 氯络合物； 络合离子； 配位数； 离子强度

摘    要：本文用极谱法研究了HCl—HClO₄体系中锑（Ⅲ）—氯络合物。实验在25℃、离子强度和酸度均为4M的条件下进行,证明溶液中存在SbCl²⁺、SbCl₂⁺、SbCl₃和SbCl₄^-四种络合离子,其生成常数分别为59、851、18620和37150。用电位法测定了Sb₂O₃—NaOH—NaClO₄体系中锑（Ⅲ）—羟基络合物的组成,证明溶液中Sb（OH）₃和Sb（OH）₄^-是主要存在形式。

Abstract: By means of polarographic method the chloride-complexes of antimonywere studied at 25℃ in HCl—HClO₄ solution at an ionic strength and acidityof 4 M. It has been shown that four complexes of antimony, SbCl²⁺, SbCl₂⁺,SbCl₃ and SbCl₄^- exist in the solution, and that their stability constants werefound to be 59, 851, 18620 and 37150 respectively. The composition of hydro-xy-complexes of an antimony has been measured through potentiometry, theresults of which showed that the major existing forms in the solution are Sb（OH）₃ and Sb（OH）₄^-.