A Modified Recipe and Variations for the Briggs–Rauscher Oscillating Reaction

Furrow, Stanley D.

doi:10.1021/ed200764r

Cited by 21 publications

(31 citation statements)

References 15 publications

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“…Taking that into account, the two laboratories were in reasonable agreement for the time to transition. This erratic behavior was previously reported [9]. We investigated stirring speed, KIO 3 vs. NaIO 3 , H 2 SO 4 vs. HClO 4 , Ce(NO 3 ) 3 , vs. Ce 2 (SO 4 ) 3 , different sources of malonic acid, recrystallized malonic acid, order of addition of reagents, concentration of stock solutions, and volume of oscillating solution, and could not see any differences attributable to those factors.…”

Section: Resultssupporting

confidence: 53%

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A Study of the Cerium-catalyzed Briggs-Rauscher Oscillating Reaction

Furrow

Cervellati

Greco

2012

Zeitschrift Für Naturforschung B

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Cerium(III) catalysts can replace manganese(II) in the classic Briggs-Rauscher oscillator also containing acid, iodate, hydrogen peroxide, and malonic acid. H 2 SO 4 was used as an acid; if HClO 4 is used, cerium iodate precipitates. Cerium(III) oxalate typically precipitates by the time oscillations end. Ce(III) at low concentrations is roughly three times as effective as Mn(II). At higher catalyst concentrations, there is a leveling effect for both. Oscillatory behavior with different concentrations is explored. Response to concentration change and inhibitors is similar with both catalysts. The mechanistic steps involving the catalysts must be similar. Ce(IV) is also an effective catalyst, although some cerium(IV) iodate may precipitate immediately.

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Section: Resultssupporting

confidence: 53%

“…Except for the effect of [H 2 SO 4 ], all of the trends were in the same direction as Mn-based oscillators [9]. The Mn(II) system was studied over a much larger range in [H 2 SO 4 ].…”

Section: Cerium Trends With Concentrationmentioning

confidence: 78%

A Study of the Cerium-catalyzed Briggs-Rauscher Oscillating Reaction

Furrow

Cervellati

Greco

2012

Zeitschrift Für Naturforschung B

Self Cite

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“…The first experiment we demonstrated with the VR educational tool is the Briggs-Rauscher reaction, [7][8] which is one of the well-known chemical oscillating reactions. The initial aqueous solution contains hydrogen peroxide (H O ), potassium iodate (KIO ), sulfuric acid (H SO ), malonic acid (CH (COOH) ), manganese sulfate monohydrate (MnSO • H O), and starch as the indicator.…”

Section: Resultsmentioning

confidence: 99%

Virtual Reality Educational Tool for Connecting Chemistry Lecture with Remote Laboratory Demonstrations

Tian¹,

Fu²,

Liu³

et al. 2020

Preprint

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<p>Providing access to up-to-date and expensive instruments for a large classroom is challenging for courses of analytical chemistry and physical chemistry, where knowledge on analytical methods or demonstration of phenomena is associated with a specialized instrument. In this technology report, we present our solution to this challenge: a virtual reality (VR) chemical educational tool that provides <i>in situ</i> user experience on research equipment to a large classroom. The VR educational tool consists of a VR camera in the laboratory attached to a teaching assistant who performs the experiment and many virtual reality playing devices in a classroom watched by students. The experience of experimenting is shared with the students in the classroom. Moreover, the VR educational tool can also provide an immersive experience on laboratory demonstrations to the general audience for outreach, without the constraint from safety concerns. Further utilization of the VR educational tool is expected to remove the barrier between the lecture room and the laboratory and enable new pedagogical methods for lectures in STEM education.</p>

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“…U stanje udaljeno od termodinamičke ravnoteže sistem se dovodi izborom početnih koncentracija i preko uticaja nekog spoljneg parametra (temperature, protoka komponenti kroz sistem, mešanja reakcione smeše, upadne svetlosti, itd..) [18,20]. Brigs-Raušer (Briggs-Rauscher, BR) reakcija je verovatno vizuelno najinteresantnija oscilatorna reakcija (pogotovo ako je prisutan skrob kao indikator), u kojoj je oksidacija malonske kiseline (CH2(COOH)2) u prisustvu vodonik-peroksida (H2O2) i kalijum jodata (KIO3) katalizovana jonom mangana (Mn 2 + ) u kiseloj sredini [21][22][23]…”

Section: Uvodunclassified

Oscillatory reaction as a system detector for doped and undoped phosphate tungsten bronzes

Maksimović

Joksović

et al. 2018

Hem Ind

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Phosphate tungsten bronzes, obtained by thermal treatment, are insufficiently investigated bronzes and there is scarce literature data on their chemical behavior and structure. Due to high-sensitivity of the Briggs-Rauscher (BR) reaction to addition of different analytes, this oscillatory reaction presents a potentially important chemical system for investigation and characterization of phosphate-tungsten bronzes, doped and undoped. The reaction mixture for the oscillatory BR reaction typically consists of H2O2, HClO4, KIO3, Mn(II) (catalyst), and CH2(COOH)2 (malonic acid, as an organic substrate). This paper deals with phosphate tungsten bronzes (PWB) and lithium doped phosphate tungsten bronzes (LiPWB) and their effects on the Briggs-Rauscher reaction dynamics. It is shown that the addition of phosphate tungsten bronzes decreases the oscillatory period length in this reaction. Furthermore, the obtained results show that PWB has a stronger influence on the BR reaction dynamics then LiPWB. In both cases, the oscillatory period is a linear function of the added bronze mass. The obtained linear functions can be successfully used for determination of the unknown bronze mass. Furthermore, due to different slopes of these functions, the Briggs-Rauscher reaction can be used as a system-detector for lithium doped and undoped phosphate tungsten bronzes. In order to elucidate the mechanism of bronze action, the inductively coupled plasma optical emission spectrometry (ICP-OES) was used to measure the total contents of K, Mn, W, Li. The aliquots of the above solution (i.e. CH2(COOH)2, MnSO4, HClO4, KIO3 but without H2O2) with the identical masses of PWB and LiPWB were examined. For the sake of comparison, contents of the metals in the solution without the bronze addition were measured, as well. Results obtained by the ICP-OES analysis show that the bronze structure is disturbed in the strong oxidizing environment (iodate in acidic solution) so that both, tungsten and lithium, leach into the BR solution. Accordingly, the proposed mechanism of the bronze action is probably by the reaction of tungsten ion with hydrogen-peroxide resulting in formation of a tungsten-peroxo complex. This complex is a stronger oxidizing agent then hydrogen peroxide itself. Thus, formation of the tungsten-peroxo complex potentially affects the kinetics of the Briggs-Rauscher reaction. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 172015, Grant no. III45001 and Grant no. III45014]

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A Modified Recipe and Variations for the Briggs–Rauscher Oscillating Reaction

Cited by 21 publications

References 15 publications

A Study of the Cerium-catalyzed Briggs-Rauscher Oscillating Reaction

A Study of the Cerium-catalyzed Briggs-Rauscher Oscillating Reaction

Virtual Reality Educational Tool for Connecting Chemistry Lecture with Remote Laboratory Demonstrations

Oscillatory reaction as a system detector for doped and undoped phosphate tungsten bronzes

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