East Tennessee State University
Determination of the Activation Parameters of Reaction Between [Fe(CN<sub>6</sub>]<sup>-4</sup> and K[Co(HEDTA)NO<sub>2</sub>].
Abstract
dc:description.abstract<p>The kinetics of the oxidation of [Fe(CN)<sub>6</sub>]<sup>-4</sup> by K[Co(HEDTA)NO<sub>2</sub>] was studied in order to get the mechanism and the activation parameters of the reaction. Using a freshly-made Na<sub>3</sub>PO<sub>4</sub> solution as the reaction medium with a pH of 6.00 the ionic strength was maintained at 0.10 M and the buffer molarity was 0.001 M.</p><p>The rate constant (k<sub>obs</sub>) of the reaction between [Fe(CN)<sub>6</sub>]<sup>-4</sup> and K[Co(HEDTA)NO<sub>2</sub>] was determined at temperatures of 25.0°C, 27.5°C, 30.0°C, 35.0°, and 40.0°C. We explored this reaction by monitoring the evolution of ferricyanide, [Fe(CN)<sub>6</sub>]<sup>-3</sup>, spectroscopically for which ε<sub>420</sub> = 1023 cm<sup>-1</sup> M<sup>-1</sup> by recording the absorbance as a function of time at 420 nm wavelength. The data were plotted and results analyzed to give activation parameters, energy of activation (Ea), entropy of activation (ΔS<sup>‡</sup>), and enthalpy of activation (ΔH<sup>‡</sup>) for the two reacting complexes under the specified reaction conditions. Based on previous results, an outer-sphere electron-transfer pathway and a first order rate of reaction for each of the reacting species <sup>1</sup> have been proposed.</p>
Degree
thesis:*- Name thesis:degree_name
- MS (Master of Science)
- Level thesis:degree_level
- Thesis - unrestricted
- Discipline thesis:degree_discipline
- Chemistry
- Year dc:date.issued
- 2009
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Eni Eni, Sammy
Subjects
dc:subject × 4Rights
dc:rights- Statement dc:rights
-
- Copyright by the authors.
Identifiers
dc:identifier.*- Repository record dc:identifier
- https://dc.etsu.edu/etd/1798
- OAI identifier oai:identifier
- oai:dc.etsu.edu:etd-3150