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

Caption: Halloween clock reaction. The clear solution in the beaker turns orange and then black. A solution of soluble starch, sodium metabisulphite and mercury (II) chloride, is poured into a solution of potassium iodide. As the mercury iodide precipitates the solution turns orange. Then as a starch-iodine complex forms turning the solution black.

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

Keywords: beaker, chemical clock reaction, chemistry, colour change, demonstration, experiment, halloween clock reaction, landolt clock reaction, mercury (ii) chloride, mercury iodide, old nassau clock reaction, one person, potassium iodide, precipitate, precipitation, reacting, redox reaction, reduction-oxidation, school science, science education, sodium metabisulphite, soluble starch, solution, sped-up, speeded-up, starch-iodine complex, time-lapse, timelapse

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.

Halloween clock reaction

K004/4363 Rights Managed

Downloadable master

Duration: 00:00:11

Frame size: 1920x1080

Frame rate: 25

Audio: No

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

File size: 224.9M

Original

Capture format: Sony FS700

Codec: Apple ProRes 422 HQ

Interlaced: Yes

Please contact Science Photo Library if you require the original, or other formats.

 

Save watermarked comp

Request un-watermarked file

Price clip Pricing

Please login to use the price calculator