Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid
In this work, the results of kinetic studies of the redox reaction of gold(III) chloride complexes ([AuCl4]-) with formic acid, are presented. Obtained data suggest the complex character of the reaction which leads to the [AuCl2]- and [AuCl3(COOH)]- ions formation as intermediates. In the p...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2015-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2015/1450-53391500017P.pdf |
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| author | Pacławski K. Sak T. |
| author_facet | Pacławski K. Sak T. |
| author_sort | Pacławski K. |
| collection | DOAJ |
| description | In this work, the results of kinetic studies of the redox reaction of
gold(III) chloride complexes ([AuCl4]-) with formic acid, are presented.
Obtained data suggest the complex character of the reaction which leads to
the [AuCl2]- and [AuCl3(COOH)]- ions formation as intermediates. In the pH
range over 2.5, the final product of the reaction is metallic gold. From the
analysis of kinetic data, the rate limiting step is found to be the gold
metallic phase formation. The stage of Au(III) reduction is relatively fast
with the second-order rate constant equal to 61.8 M-1s-1 at temperature 50ºC.
The rate of the studied reaction depends on the temperature, reactants
concentration and chloride ions concentration. As a result of the data
analysis, the scheme of the reaction path has been suggested. Also, the
values of enthalpy and entropy of activation for the reaction have been
determined. |
| format | Article |
| id | doaj-art-7065fa2a096e43d39b75895c6f792ffc |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-7065fa2a096e43d39b75895c6f792ffc2025-02-02T04:51:24ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752015-01-0151213314210.2298/JMMB141024017P1450-53391500017PKinetics and mechanism of the reaction of gold(III) chloride complexes with formic acidPacławski K.0Sak T.1AGH University of Science and Technology, Faculty of Non-Ferrous Metals, Laboratory of Physicochemistry and Metallurgy of Non-Ferrous Metals, Krakуw, PolandAGH University of Science and Technology, Faculty of Non-Ferrous Metals, Laboratory of Physicochemistry and Metallurgy of Non-Ferrous Metals, Krakуw, PolandIn this work, the results of kinetic studies of the redox reaction of gold(III) chloride complexes ([AuCl4]-) with formic acid, are presented. Obtained data suggest the complex character of the reaction which leads to the [AuCl2]- and [AuCl3(COOH)]- ions formation as intermediates. In the pH range over 2.5, the final product of the reaction is metallic gold. From the analysis of kinetic data, the rate limiting step is found to be the gold metallic phase formation. The stage of Au(III) reduction is relatively fast with the second-order rate constant equal to 61.8 M-1s-1 at temperature 50ºC. The rate of the studied reaction depends on the temperature, reactants concentration and chloride ions concentration. As a result of the data analysis, the scheme of the reaction path has been suggested. Also, the values of enthalpy and entropy of activation for the reaction have been determined.http://www.doiserbia.nb.rs/img/doi/1450-5339/2015/1450-53391500017P.pdfkineticsmechanism of reactionredox reactiongold(III) complexformic acid |
| spellingShingle | Pacławski K. Sak T. Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid Journal of Mining and Metallurgy. Section B: Metallurgy kinetics mechanism of reaction redox reaction gold(III) complex formic acid |
| title | Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid |
| title_full | Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid |
| title_fullStr | Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid |
| title_full_unstemmed | Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid |
| title_short | Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid |
| title_sort | kinetics and mechanism of the reaction of gold iii chloride complexes with formic acid |
| topic | kinetics mechanism of reaction redox reaction gold(III) complex formic acid |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2015/1450-53391500017P.pdf |
| work_keys_str_mv | AT pacławskik kineticsandmechanismofthereactionofgoldiiichloridecomplexeswithformicacid AT sakt kineticsandmechanismofthereactionofgoldiiichloridecomplexeswithformicacid |