The Briggs-Rauscher Oscillating Color Change Reaction

[limilaw]

The colours looks alluring.

[SwissDonutFactory]

dont try to understand this reaction since its VERy complicated. ive warned you

[rhodio1968]

I think that this is NOT the Briggs-Rauscher Oscillating Reaction, but this IS the Belousov-Zhabotinsky Oscillating Reaction: Malonic Acid (COOHCH2COOH), Potassium Bromate (KBrO3), Sulphuric Acid (H2SO4) and Potassium Bromide (KBr). The color indicator is Ferroin. The composition is easy to find on the web. Look up "Belousov-Zhabotinsky Oscillating Reaction".

Enjoy!!! :-D

[johmarsch]

@rhodio1968 What is the difference between the two reactions?

[1989Gez1989]

please can the author of the video post the REAGENTS and QUANTITIES? I would really like to perform this experiment in a demonstration lecture. Thanks!

[THATxKIID]

does anyone know where i can find the directions and materials needed for this experiment? i would appreciate it very much...message me with a link ASAP please, and thank you

[Phenylbutanol]

What did you guys add to the solution to get colors like this? Usually the BR reaction only has a colorless, amber and dark-blue/almost black color. Did you use a low starch concentration? I did the BR for a demo at school after I saw this but I still dont know how in the world you got it like this :( I still want to know :'(

[wrauscher]

@Phenylbutanol The color changes seen here are those of the related Belousov-Zhabotinskii reaction, with Ferroin (Iron phenanthroline) indicator. Check out any video of that reaction. Smart question!

[bowtech616]

@Phenylbutanol This isnt the Briggs-Rauscher oscillating reaction. This one contains completely different components, starch isnt even used in this reaction.

[Phenylbutanol]

@bowtech616 Yeah I figured that after I commented. First I thought they added other stuff to the solution (while still being BR) but that isn't even possible. So yus this is very different. Still one hella awesome reaction to use as a demo for people that don't like chemistry.. I mean chemistry is awesome!! o.o

[nickharvey7]

I have read that colour is linked to the wavelength of light does the colour of the water change because the wavelength of the light going through the water changes?

[Izerion]

@nickharvey7 Actually, the chemicals in the water absorb certain wavelengths of light while reflecting others (white light is made up of all colors). The combination of wavelengths they reflect is what gives the mixture its color. Basically the reason why the mixture keeps changing, is because of a chemical reaction that occurs in the mixture. The chemicals react and change into others, which absorb different colors, so the color of the mixture changes. The rest is too difficult to explain here.

[mooseman142]

@nickharvey7

Do you really think that there is only water in the beaker? = lol

[Gasharca]

Nice resolution! You can actually see what's going on unlike in most videos :)

[marriedtojoshlucas]

Heyy, this is really brilliant! (: