The kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions
The kinetics of -the peroxoclisulphate/formate reaction have been studied using four methods, (1) By titrating aliquots of reaction mixture, (2) By following pH changes, (3) By a manual pH-stat. (4) By an automatic pH-stat, Kinetic data was obtained at pH values from pH 4.0 to pH 8.0 at an ionic...
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University of Canterbury. Chemistry
2014
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ndltd-canterbury.ac.nz-oai-ir.canterbury.ac.nz-10092-93942015-03-30T15:31:35ZThe kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ionsO'Flynn, T. J.The kinetics of -the peroxoclisulphate/formate reaction have been studied using four methods, (1) By titrating aliquots of reaction mixture, (2) By following pH changes, (3) By a manual pH-stat. (4) By an automatic pH-stat, Kinetic data was obtained at pH values from pH 4.0 to pH 8.0 at an ionic strength of 0.2M and at temperatures from 30° to 50°C, using method (4). Changes of rate constant with pH were considerable. Kintetic data at pH = 8.0, temperature = 35°C and ionic strength = 0.2M are, first order rate constant k₁ = 9.59 x 10-⁵ sec -¹, Ea = 11.9 Kcal mole -¹ PZ = 2.49 x 10⁴ sec -¹. A mechanism is postulated to explain the observed kinetics for the uncatalysed reaction. The kinetics of the cupric ion catalysed reaction were studied over a range of cupric ion concentrations from 2.5 x 10-⁴ to 6.25 x 10-⁴M at 30°C and pH 5.0 using method (4).University of Canterbury. Chemistry2014-07-20T22:35:11Z2014-07-20T22:35:11Z1968Electronic thesis or dissertationTexthttp://hdl.handle.net/10092/9394enNZCUCopyright T. J. O'Flynnhttp://library.canterbury.ac.nz/thesis/etheses_copyright.shtml |
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en |
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description |
The kinetics of -the peroxoclisulphate/formate reaction have been studied using four methods, (1) By titrating aliquots of reaction mixture,
(2) By following pH changes,
(3) By a manual pH-stat.
(4) By an automatic pH-stat,
Kinetic data was obtained at pH values from pH 4.0 to pH 8.0 at an ionic strength of 0.2M and at temperatures from 30° to 50°C, using method (4). Changes of rate constant with pH were considerable. Kintetic data at pH = 8.0, temperature = 35°C and ionic strength = 0.2M are, first order rate constant k₁ = 9.59 x 10-⁵ sec -¹, Ea = 11.9 Kcal mole -¹ PZ = 2.49 x 10⁴ sec -¹.
A mechanism is postulated to explain the observed kinetics for the uncatalysed reaction.
The kinetics of the cupric ion catalysed reaction were studied over a range of cupric ion concentrations from 2.5 x 10-⁴ to 6.25 x 10-⁴M at 30°C and pH 5.0 using method (4). |
author |
O'Flynn, T. J. |
spellingShingle |
O'Flynn, T. J. The kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions |
author_facet |
O'Flynn, T. J. |
author_sort |
O'Flynn, T. J. |
title |
The kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions |
title_short |
The kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions |
title_full |
The kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions |
title_fullStr |
The kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions |
title_full_unstemmed |
The kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions |
title_sort |
kinetics and mechanism of the oxidation of formate ions by peroxodisulphate ions |
publisher |
University of Canterbury. Chemistry |
publishDate |
2014 |
url |
http://hdl.handle.net/10092/9394 |
work_keys_str_mv |
AT oflynntj thekineticsandmechanismoftheoxidationofformateionsbyperoxodisulphateions AT oflynntj kineticsandmechanismoftheoxidationofformateionsbyperoxodisulphateions |
_version_ |
1716799795113230336 |