Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Measuring reaction rates. Time-lapse footage of a laboratory experiment to measure reaction rates. This reaction is between sodium thiosulphate and dilute hydrochloric acid. The clip starts with the addition of the acid to the sodium thiosulphate solution. A stopwatch (right) is used to time the reaction and the solution is swirled by hand at regular intervals. The progress of the reaction is measured by the formation of sulphur which make the solution go cloudy. The time taken for the cross on the white paper below the reaction beaker to no longer be visible is noted. For the first stage of this experiment (measuring the starting temperature), see clip K004/1466.

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Keywords: blue background, chemical, chemistry, cloudy, dilute, education, educational, experiment, hydrochloric acid, lab, laboratory, looking down, measurement, measuring, rates, reaction rate, reagents, school science, sequence, series, sodium thiosulphate, speeded up, stage, stopwatch, studio shot, sulfur, sulphur, time, time-lapse, timing

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Measuring reaction rates

K004/1465 Rights Managed

Downloadable master

Duration: 00:00:14.11

Frame size: 1920x1080

Frame rate: 24

Audio: No

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

File size: 328.6M

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Capture format: Unknown

Codec: Photo - JPEG

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