Instabilities in propagating reaction-diffusion fronts of the iodate-arsenous acid reaction

D. Horváth, Kenneth Showalter

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Instabilities in propagating fronts of the iodate-arsenous acid reaction are predicted by an empirical rate-law model. The planar front loses stability when the ratio of the reactant diffusivity to the autocatalyst diffusivity exceeds a critical value. The relative diffusivities can be altered by introducing a reagent that reacts specifically with the autocatalyst to form an immobile complex. Experiments were carried out using a convection-free gelled medium, loaded with reaction mixture containing complexing agent at different concentrations. Instabilities were found above a critical concentration, with the appearance of cellular fronts much like those predicted by the empirical rate-law model.

Original languageEnglish
Pages (from-to)2471-2478
Number of pages8
JournalThe Journal of Chemical Physics
Volume102
Issue number6
Publication statusPublished - 1995

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Iodates
iodates
diffusivity
acids
Natural convection
free convection
reagents
arsenous acid
Experiments

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Instabilities in propagating reaction-diffusion fronts of the iodate-arsenous acid reaction. / Horváth, D.; Showalter, Kenneth.

In: The Journal of Chemical Physics, Vol. 102, No. 6, 1995, p. 2471-2478.

Research output: Contribution to journalArticle

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