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Kinetic, spectroscopic and potentiometric studies of the redox reactions of the iron (III) and copper (II) thiosulfate complexes

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Beach, Fiona G.(Fiona Grace) (2003) Kinetic, spectroscopic and potentiometric studies of the redox reactions of the iron (III) and copper (II) thiosulfate complexes. PhD thesis, University of Tasmania.

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Abstract

The mechanism of the copper(II)-catalysed oxidation of thiosulfate ion by
iron(III) in aqueous solutions is poorly understood, but is of interest because of
its analytical applications, and its relevance to the disposal of waste solutions
of thiosulfate and sulfoxyanions in general. The aim of this study was to
determine or confirm the mechanisms of the reactions between copper(H) and
thiosulfate, iron(III) and thiosulfate, and the reaction of aqueous mixtures of
both metal ions with thiosulfate. This was done with a view to assessing the
application of these reactions in both existing and proposed analytical
procedures for the determination of copper and/or iron in aqueous media, with
techniques such as flow-injection analysis.
Stopped-flow and continuous flow methods were employed both to
characterise the short-lived, coloured complexes of copper(II) and iron(III)
with thiosulfate and to record kinetic data for the study of their rapid
decomposition reactions. In addition, Raman spectra of frozen solutions of the
iron (III)-thiosulfate complex were recorded for the first time.

Item Type: Thesis (PhD)
Keywords: Thiosulphates
Copyright Holders: The Author
Additional Information:

Thesis (Ph.D.)--University of Tasmania, 2003. Includes bibliographical references

Date Deposited: 25 Nov 2014 00:52
Last Modified: 11 Mar 2016 05:54
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