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

Caption: Disinfecting water with chlorine gas. Chlorine is produced in the flask at left, by the reaction of hydrochloric acid with potassium permanganate. It bubbles into water that also contains universal indicator, making it green. The chlorine instantly bleaches the indicator colourless, and the green gas collects above the water. When more indicator is added, it turns red, indicating the presence of acid. The acids are hydrochloric and hypochlorous acid, which is reponsible for the disinfectant properties.

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

Keywords: acid, bench, bleach, bleaching, chemical, chemistry, chlorine, colour change, demonstrating, demonstration, disinfectant, disinfecting, drinking water, education, educational, gas, glassware, hypochlorous, lab, laboratory, neutral, potable, reacting, reaction, red, school, science, solution, sterilisation, sterilising, universal indicator, water

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Chlorine disinfection of water

K004/2130 Rights Managed

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Duration: 00:00:16.14

Frame size: 1920x1080

Frame rate: 25

Audio: No

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

File size: 329.6M

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Capture format: Sony FS700

Codec: H.264

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