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Formation of Glycinate Complexes of Iron(II) in Solutions of Different Ionic Strengths
Russian Journal of Physical Chemistry A ( IF 0.7 ) Pub Date : 2020-08-06 , DOI: 10.1134/s0036024420080233
M. Rakhimova , G. B. Eshova , Dz. A. Davlatshoeva , L. V. Kvyatkovskaya , F. Miraminzoda

Abstract

Processes of complexation in the Fe(0)–Fe(II)–glycine–Na(H)ClO4–H2O system at a temperature of 298.15 K, an ionic strength of solutions of 0.1–1.0 (NaClO4), СFe(II) = 1 × 10−3, and in the pH range of 0.8–8.0 are studied according to the Clark–Nikolsky oxidation potential. Experimental curves are obtained for the dependences of EMF on concentration, рН, pCFe(II), рСHL. Successive approximation of theoretical and experimental oxidative potential functions is used to calculate the constants of complexation. The dependence of the constant of complexation on the ionic strength of the solution is calculated on the basis of the Debye–Hückel theory. It is found that the formation constants of coordination compounds fall as the ionic strength of a solution rises.


中文翻译:

不同离子强度溶液中铁(II)甘氨酸盐配合物的形成

摘要

Fe(0)–Fe(II)–甘氨酸–Na(H)ClO 4 –H 2 O系统在298.15 K的温度下的络合过程,溶液的离子强度为0.1–1.0(NaClO 4),С根据Clark-Nikolsky氧化电势,研究了Fe(II) = 1×10 -3,并且在0.8-8.0的pH范围内。实验曲线对EMF对浓度,рН,对所述相关性得到Ç的Fe(II) ,查阅商品说明р С HL。理论和实验氧化电位函数的逐次逼近用于计算络合常数。根据Debye–Hückel理论计算出络合常数对溶液离子强度的依赖性。发现配位化合物的形成常数随着溶液的离子强度的增加而降低。
更新日期:2020-08-06
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