Credit: RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA/SCIENCE PHOTO LIBRARY

Caption: Belousov-Zhabotinsky (BZ) reaction. 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 high-speed footage of this reaction, see clip K004/5018.

Release details: Model release not required. Property release not required.

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Belousov-Zhabotinsky reaction

K004/5017 Rights Managed

Downloadable master

Duration: 00:00:20

Frame size: 1920x1080

Frame rate: 25

Audio: No

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

File size: 284.4M

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Capture format: Sony FS700

Codec: Apple ProRes 422 HQ

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