give a test for presence of carbon dioxide gas
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The most effective way to test for CO2 is to bubble the gas through "limewater", a diluted solution of calcium hydroxide (slaked lime). When you bubble carbon dioxide through the solution, it forms a solid precipitate of calcium carbonate – chalk or limestone.
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lime water experiment.
when you breath out in lime water it turns milky. this shows that the air we expel contains carbon dioxide gas.
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