The reagent used to test for the presence of carbon dioxide?

 

Question: The reagent used to test for the presence of carbon dioxide?

The reagent commonly used to test for the presence of carbon dioxide is limewater, which is a diluted solution of calcium hydroxide. When carbon dioxide is bubbled through limewater, it reacts to form calcium carbonate, which creates a white precipitate and causes the solution to turn milky or cloudy. This change is a positive indication of the presence of carbon dioxide. The chemical equation for this reaction is: \(Ca(OH)_2(aq) + CO_2(g) \rightarrow CaCO_3(s) + H_2O(l)\). This test is simple yet effective and is widely used in educational demonstrations and various industries to confirm the presence of carbon dioxide gas.

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