How will you show the presence of carbon dioxide in air
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A standard test for the presence of carbon dioxide is its reaction with limewater (a saturated water solution of calcium hydroxide) to form a milky-white precipitate of calcium hydroxide.
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Answer:
The presence of carbon dioxide can be tested by passing carbon dioxide through limewater and limewater turn milky due to the formation of Calcium carbonate.
Formulas:
Limewater + C02 = Calcium Carbonate (milky) + H2O
Ca(OH)2 + CO2 = CaCO3 + H2O
(calcium ( calcium
hydroxide) carbonate)
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