Non-stirred Briggs-Rauscher oscillating chemical reaction

Non-stirred Briggs-Rauscher oscillating chemical reaction. The reaction is carried out in shallow vessel. After the initial stir to mix all components together, the solution of reagents is left still until the end of reaction. The actual reaction is three times slower.

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Briggs-Rauscherjeva oscilirajoča kemijska reakcija v 2D. Reakcija je bila izvedena v plitki posodi. Raztopino v posodi smo premešali zgolj na začetku reakcije, da so se med sabo premešali reagenti in posodo nato pustili pri miru, da je reakcija potekla do konca. Reakcija poteka trikrat počasneje, kot je prikazano na posnetku.

Category:

Education

Tags:

• Briggs
• Rauscher
• 2D
• iodate
• peroxide
• IO3
• H2O2
• starch
• oscillating
• chemical
• reaction
• abstract

[lostcause28]

Why does the reaction change always start on the outside, greater velocity/mixing on the initial stir?

[kviht]

@lostcause28 The reaction is very sensible to initial conditions and concentrations. The solution in beaker is obviously not stirred perfectly, so probably something triggered the first cycle of the reaction near the outside region. The ongoing reaction then cycles in regular time intervals, thats why always seems to start on the outside.