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本文用pH滴定法研究Fe(Ⅲ)与N-邻羟基苄基氨乙酸(HBG)的络合行为以及1:1络合物(FeL~+)的水解和聚合作用。测定了30.0±0.1℃、μ=0.1(NaClO_4)的水溶液中Fe(Ⅲ)与HBG络合物的逐级稳定常数以及FeL~+的第一级水解平衡常数和水解产物(Fe(OH)L)的二聚平衡常数。讨论了pH滴定曲线、溶液中的平衡及水解产物的存在形式。
In this paper, the complexation of Fe (Ⅲ) with N-hydroxybenzylglycine (HBG) and the hydrolysis and polymerization of 1: 1 complex (FeL ~ +) were investigated by pH titration. The stability constants of Fe (Ⅲ) and HBG complexes at 30.0 ± 0.1 ℃ and μ = 0.1 (NaClO_4) and the first order hydrolysis constants of FeL ~ + and the hydrolytic products of Fe (OH) L ) Of the dimeric equilibrium constant. The pH titration curve, the equilibrium in solution and the presence of hydrolysates were discussed.