Caption: Belousov-Zhabotinsky (BZ) reaction. High-speed footage demonstrating a Belousov-Zhabotinsky (BZ) reaction, in which bromate ions oxidise malonic acid to carbon dioxide. A solution containing bromate ions and malonic acid is mixed in a beaker using a magnetic spinner, with cerium (IV) ions as a catalyst. The reaction mixture oscillates in colour between red-brown and colourless with a time period of about 20 seconds, in two auto-catalytic processes. Bromate ions (colourless) are reduced to molecular bromine (red-brown), and then to bromide ions (colourless) in the presence of cerium ions, and malonic acid is oxidised to carbon dioxide and water. This reaction is an example of a class of reactions called Belousov-Zhabotinsky (BZ) reactions and is an example of non-equilibrium thermodynamics, and a non-linear chemical oscillator. For the reaction at normal speed, see clip K004/5017.

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Belousov-Zhabotinsky reaction

K004/5018 Rights Managed

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Duration: 00:01:02.14

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 952.4M


Capture format: Sony FS700

Codec: Apple ProRes 422 HQ

File size: 952.4M

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