This reaction is an extremely interesting reaction that is a rare phenomenon in chemistry – an oscillating reaction. Three clear solutions are combined, and the color gradually changes to amber. Suddenly, the whole thing goes dark blue! This remains for a bit, then fades back into amber and the whole cycle repeats.
The full reaction mixture is a stew of many different chemicals:
0.15M malonic acid
Starch (very tiny amount, since it is only slightly soluble)
The three are combined together in equal amounts. There are as many as 30 different reactions happening simultaneously during the reaction. The paper I mention that talks about this in great detail is titled “The Oscillatory Briggs-Rauscher Reaction. 3. A Skeleton Mechanism for Oscillations” by Noyes and Furrow. I found it online someplace, but can’t seem to locate it again for free.
Anyways I hope my explanation was helpful! It took me a while to get a good grasp of it myself. As always, thanks for watching and if you have any questions please let me know.
Found @ MrHomeScientist’s video channel.
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