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A kinetic and mechanistic study of oxidation of arsenic(III) by hexacyanoferrate(III) in aqueous ethanoic acid
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chimatadar, Shivamurti A. Salunke, Manjalee S. Nandibewoor, Sharanappa T. |
| Copyright Year | 2004 |
| Abstract | The kinetics of oxidation of AsIIIby Fe(CN)63− has been studied spectrophotometrically in 60% AcOH–H2O containing 4.0 mol dm−3HCl. The oxidation is made possible by the difference in redox potentials. The reaction is first order each in [Fe(CN)63−] and [AsIII]. Amongst the initially added products, Fe(CN)64− retards the reaction and AsVdoes not. Increasing the acid concentration at constant chloride concentration accelerates the reaction. At constant acidity increasing chloride concentration increases the reaction rate, which reaches a maximum and then decreases. H2Fe(CN)6−, is the active species of Fe(CN)63−, while AsCl52− in an ascending portion and AsCl2+ in a descending portion are considered to be the active species of AsIII. A suitable reaction mechanism is proposed and the reaction constants of the different steps involved have been evaluated. |
| Starting Page | 743 |
| Ending Page | 750 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11243-004-8776-z |
| Volume Number | 29 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/s11243-004-8776-z |
| Alternate Webpage(s) | https://doi.org/10.1007/s11243-004-8776-z |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
