What chemical do we use to test for carbon dioxide?
limewater
The chemical commonly used to test for the presence of carbon dioxide is limewater (Calcium Hydroxide solution). When carbon dioxide is bubbled through limewater, it reacts with the calcium hydroxide to form calcium carbonate which is insoluble in water and results in a cloudy precipitate. This reaction can be useful in many practical applications, including in industry, environmental testing, and even in the classroom to demonstrate the properties of gases and their reactions with other substances.
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