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

Caption: Sulphur dioxide gas being passed into water, with the reaction revealed by the addition of universal indicator. In neutral water, the indicator is green. Sulphur dioxide is an acidic gas, dissolving in water to form sulphurous acid, which readily dissociates in solution. This makes it very acidic, turning the universal indicator red. This is one of the reactions that occurs in the atmosphere to form acid rain, as sulphur dioxide is a common industrial pollutant.

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Keywords: acid, acid rain, acidic, air, atmosphere, atmospheric, bubbles, bubbling, chemical, chemistry, colour change, demonstrating, demonstration, dioxide, dissolves, dissolving, education, educational, gas, glassware, industrial, industry, neutral, ph, pollutant, pollution, red, solution, sulfur, sulfurous, sulphur dioxide, sulphurous, ui, universal indicator, water

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Sulphur dioxide gas in water

K004/1948 Rights Managed

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Duration: 00:00:15

Frame size: 1920x1080

Frame rate: 25

Audio: No

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

File size: 301.1M

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Capture format: Sony FS700

Codec: H.264

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