How do we test the presence of carbon dioxide and moisture in exhaled air?
Answers
Limewater Test - To check for carbon dioxide in your breath. Using lime water is a fun and easy way to test for the presence of carbon dioxide. The exhaled carbon dioxide is used to produce a precipitate of calcium carbonate with the lime water.
if the lime water turns milky, then the gas exhaled is CO2
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Answer: The Limewater Carbon Dioxide Test
We can test the presence of carbon dioxide in exhaled air by the following experiment :
⇒ Take a closed test tube filled with limewater
⇒ Now use a syringe to let in the atmospheric air , we will observe that the lime water turns slightly milky
⇒ Now use your moth to blow air from your mouth to another test tube filled with lime water
⇒ We will observe that the lime water turns milky and produces a precipitate of CaCO₃ (Calcium Carbonate)