УДК 544.144.4 УДК 544.342

INFLUENCE OF CONCENTRATION PARAMETERS OF SOLUTION OF THE HOMOGENEOUS SYSTEM FE(II) - FE(III) - GLYCINE - NA(H)CLO4 - H2O ON THE COMPOSITION OF COMPLEXES FORMED Influence of concentration parameters of solution of the homogeneous system Fe(II) - Fe(III) - glycine - Na(H)ClO4 - H2O on the composition of complexes formed

Опубликовано в От химии к технологии шаг за шагом · Том 4, Номер 1 · Страницы 101–106 · Рубрика: Научные статьи
DOI: https://doi.org/10.52957/27821900_2023_01_101
Получено: 28.12.2022 Одобрено: 21.03.2023 Опубликовано: 23.03.2023 Язык публикаций: ENG
We studied the complexation processes in the system Fe(II) - Fe(III) - glycine - Na(H)ClO4 - H2O at temperature 308.16 K, solution ionic strength 0.75(Na(H)ClO4), CFe(III) = CFe(II) = 1-10-3 and CGly = 3·10-3 mol/l in the pH range 0.5-8.5 by the Clark-Nikolsky method. Therefore, we obtain an experimental curves of system EMF dependence on concentration parameters: pH, pCFe(III), pCFe(II), pCL. We also obtain the formation of the studied system coordination compounds of Fe(III) composition: [FeHL(H2O)5]3+, [Fe(HL)2(H2O)4]3+, [Fe2(HL)2(OH)2(H2O)8]4+, [FeIIIFeII(HL)2(OH)2(H2O)8]3+, as well as Fe(II): [Fe(HL)(H2O)5]2+, [Fe(HL)(OH)((H2O)]4+, [FeIIFeIII(HL)2(OH)2(H2O)8]3+. To calculate the constants of complex formation we used the method of successive approximation of the theoretical and experimental oxidation functions using the Excel program.
Fe(II), Fe(III), glycine, compounds, formation constant, ionic strength, oxidometric method, oxidation function
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