DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES

DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES

The complex formation of cobalt (II) with citrate (cit3–) and molybdate (MoO42–) ions in 0.3 mol·l-1 Na2SO4 solution at 20°C was studied by spectrophotometric method. It has been established that in a citrate-molybdate electrolyte at pH 9.0, cobalt (II) ions form, depending on the ratio of the equil...

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Date:2023
Main Authors: Nikitenko, Vasyl, Kublanovsky, Valeriy, Yapontseva, Yuliya
Format: Article
Language:English
Published: V.I.Vernadsky Institute of General and Inorganic Chemistry 2023
Online Access:https://ucj.org.ua/index.php/journal/article/view/537
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Journal Title:Ukrainian Chemistry Journal

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Ukrainian Chemistry Journal
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spelling oai:ojs2.1444248.nisspano.web.hosting-test.net:article-5372023-06-14T19:46:41Z DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES Nikitenko, Vasyl Kublanovsky, Valeriy Yapontseva, Yuliya cobalt (II), molybdate, citrate and polyligand complexes, composition, equilibrium constant, stability constant, spectrophotometry. The complex formation of cobalt (II) with citrate (cit3–) and molybdate (MoO42–) ions in 0.3 mol·l-1 Na2SO4 solution at 20°C was studied by spectrophotometric method. It has been established that in a citrate-molybdate electrolyte at pH 9.0, cobalt (II) ions form, depending on the ratio of the equilibrium concentrations of ligands: molybdate [Co(MoO4)2]2–, citrate [Co(cit)2]4– and polyligand complexes [Co(cit)m(MoO4)n]+2-(3m+2n). The composition of [Co(cit)(MoO4)]3– polyligand complexes was determined, the equilibrium constant Ke of the reaction of their formation and their stability constant (lgβMLX = 5.86) The dependence of the degree of formation of molybdate, citrate and polyligand complexes of cobalt (II) in citrate-molybdate electrolyte on the logarithm of the ratio of equilibrium concentrations of ligands was calculated. V.I.Vernadsky Institute of General and Inorganic Chemistry 2023-04-28 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/537 10.33609/2708-129X.89.03.2023.15-24 Ukrainian Chemistry Journal; Vol. 89 No. 3 (2023): Ukrainian Chemistry Journal; 15-24 Украинский химический журнал; Том 89 № 3 (2023): Ukrainian Chemistry Journal; 15-24 Український хімічний журнал; Том 89 № 3 (2023): Український хімічний журнал; 15-24 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/537/272
institution Ukrainian Chemistry Journal
baseUrl_str
datestamp_date 2023-06-14T19:46:41Z
collection OJS
language English
topic_facet cobalt (II)
molybdate
citrate and polyligand complexes
composition
equilibrium constant
stability constant
spectrophotometry.
format Article
author Nikitenko, Vasyl
Kublanovsky, Valeriy
Yapontseva, Yuliya
spellingShingle Nikitenko, Vasyl
Kublanovsky, Valeriy
Yapontseva, Yuliya
DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES
author_facet Nikitenko, Vasyl
Kublanovsky, Valeriy
Yapontseva, Yuliya
author_sort Nikitenko, Vasyl
title DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES
title_short DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES
title_full DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES
title_fullStr DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES
title_full_unstemmed DETERMINATION OF THE COMPOSITION AND STABILITY CONSTANT OF COBALT (II) POLYLIGAND CITRATE-MOLYBDATE COMPLEXES
title_sort determination of the composition and stability constant of cobalt (ii) polyligand citrate-molybdate complexes
description The complex formation of cobalt (II) with citrate (cit3–) and molybdate (MoO42–) ions in 0.3 mol·l-1 Na2SO4 solution at 20°C was studied by spectrophotometric method. It has been established that in a citrate-molybdate electrolyte at pH 9.0, cobalt (II) ions form, depending on the ratio of the equilibrium concentrations of ligands: molybdate [Co(MoO4)2]2–, citrate [Co(cit)2]4– and polyligand complexes [Co(cit)m(MoO4)n]+2-(3m+2n). The composition of [Co(cit)(MoO4)]3– polyligand complexes was determined, the equilibrium constant Ke of the reaction of their formation and their stability constant (lgβMLX = 5.86) The dependence of the degree of formation of molybdate, citrate and polyligand complexes of cobalt (II) in citrate-molybdate electrolyte on the logarithm of the ratio of equilibrium concentrations of ligands was calculated.
publisher V.I.Vernadsky Institute of General and Inorganic Chemistry
publishDate 2023
url https://ucj.org.ua/index.php/journal/article/view/537
work_keys_str_mv AT nikitenkovasyl determinationofthecompositionandstabilityconstantofcobaltiipolyligandcitratemolybdatecomplexes
AT kublanovskyvaleriy determinationofthecompositionandstabilityconstantofcobaltiipolyligandcitratemolybdatecomplexes
AT yapontsevayuliya determinationofthecompositionandstabilityconstantofcobaltiipolyligandcitratemolybdatecomplexes
first_indexed 2025-09-24T17:43:50Z
last_indexed 2025-09-24T17:43:50Z
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