Positive Test For Carbon Dioxide
by Martyn F. Chillmaid/science Photo Library
Title
Positive Test For Carbon Dioxide
Artist
Martyn F. Chillmaid/science Photo Library
Medium
Photograph - Photograph
Description
Positive test for carbon dioxide. The liquid in the test tube is a saturated solution of calcium hydroxide (limewater), which is colourless. When air is bubbled into it through a glass straw the carbon dioxide turns the limewater cloudy. This is because calcium carbonate is precipitated out as a white suspended solid.
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April 26th, 2022
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