FWS – The Briggs-Rauscher Reaction

The Briggs-Rauscher reaction is a colourless solution that becomes amber then suddenly turns blue-black. The blue-black will fade to colourless, and the cycle will repeat several times with a period which initially lasts a few seconds but gradually lengthens. After a few minutes the solution will remain blue-black that liberates iodine vapors.

The reaction can occur via two differ processes. A radical process and a non radical process. Which of these two processes dominates is determined by the concentration of iodide ions in the solution. When iodide ion concentration s low the radical process dominates. when its high the non radical process is the dominant. Basically each of the processes of produces conditions favorable to the other, and, therefore, the reaction oscillates between the two.

Briggs–Rauscher reaction

“How it Begins” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0

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About Myles Power (757 Articles)
Hello Internet! My name is Myles Power and I am a chemist from the North East of England, who loves to make videos trying to counter pseudoscience and debunk quackery in all of its various forms! From the hype around GMOs through to Atrazine turning the freakin’ frogs gay, I’ll try to cut through the nonsense that’s out there!

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