Carbon Dioxide (Oxford AQA IGCSE Chemistry)
Revision Note
Author
Alexandra BrennanExpertise
Chemistry
Carbon Dioxide Test
The test for carbon dioxide involves bubbling the gas through an aqueous solution of limewater (calcium hydoxide)
If the gas is carbon dioxide, the limewater turns cloudy white
Testing for carbon dioxide gas
Exam Tip
Sometimes students think that extinguishing a burning splint indicates carbon dioxide gas. However, while it is a property of carbon dioxide, other gases, such as nitrogen, will also do this, so the test is not definitive and should not be quoted in an exam answer.
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