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Kinetics of the oxidation of iron (II) by bromine. Complex ion formation in the systems iron (III), phosphoric acid. Kinetics of the oxidation of ferrocyanide ion by bromine

Citation

Carter, Paul R. (1953) Kinetics of the oxidation of iron (II) by bromine. Complex ion formation in the systems iron (III), phosphoric acid. Kinetics of the oxidation of ferrocyanide ion by bromine. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-04222003-090120

Abstract

NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. The kinetics of the oxidation of iron (II) by bromine has been studied spectrophotometrically. At (Br[...]) = 0.50 M, tribromide ion was found to be the reactive bromine species, while evidence for HOBr and Br[subscript 2] reacting with iron (II) was obtained at (Br[...]) [...] 10[superscript -3] M. A mechanism involving Br[...][subscript 2] is suggested, and the observed inhibition by iron (III) eliminates an alternative mechanism involving iron (IV) as an unstable intermediate. The catalytic effect of phosphoric acid was investigated.

The ultraviolet light absorption of iron (III) in phosphoric acid was studied. An attempt was made to determine the nature of the complex that is present. The presence of only one complex could not be verified.

The oxidation of ferrocyanide ion by bromine was found to proceed at a faster pace than the analogous oxidation of iron (II). Both molecular bromine and tribromide ion were found to react with ferrocyanide ion when (Br[...]) = 0.05 M. The reaction appeared to be first order with respect to bromine and ferrocyanide ion at H[superscript +] = 0.93 M, but was found to deviate from a simple second order behaviour when the hydrogen ion concentration was decreased to 0.50 M.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1953
Record Number:CaltechETD:etd-04222003-090120
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-04222003-090120
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1445
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:22 Apr 2003
Last Modified:26 Dec 2012 02:38

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