A new bromite oscillator. Large-amplitude pH oscillations in the bromite-thiosulfate-phenol flow system

M. Orbán, Irving R. Epstein

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The reaction between bromite and thiosulfate ions in aqueous solution with and without phenol has been studied under batch and flow conditions. The bromite oxidation of thiosulfate proceeds via two consecutive fast reactions, the first accompanied by a significant increase, the second by a large decrease in pH. The H+ production is autocatalytic and strongly influenced by phenol. The bromite-thiosulfate-phenol flow system exhibits bistability and large-amplitude pH oscillations. Several relevant reactions such as bromite-phenol, bromite-bromide, bromate-thiosulfate, and bromate-phenol were also investigated, and their participation in the batch and flow behavior of the bromite-thiosulfate-phenol system is discussed. A qualitative explanation of the pH oscillation is proposed.

Original languageEnglish
Pages (from-to)2358-2362
Number of pages5
JournalJournal of Physical Chemistry
Volume99
Issue number8
Publication statusPublished - 1995

Fingerprint

Thiosulfates
Phenol
phenols
Phenols
oscillators
oscillations
Bromates
bromates
Bromides
bromides
Ions
aqueous solutions
Oxidation
oxidation
ions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

A new bromite oscillator. Large-amplitude pH oscillations in the bromite-thiosulfate-phenol flow system. / Orbán, M.; Epstein, Irving R.

In: Journal of Physical Chemistry, Vol. 99, No. 8, 1995, p. 2358-2362.

Research output: Contribution to journalArticle

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