Take lime water and check the carbon dioxide presence in exhalation process
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Explanation:
Yes this is done because slaked like reacts with carbondioxide to produce calcium carbonate which is a white color ppt
Ca(OH)2+CO2-------CaCO3+H2O
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carbon dioxide + calcium hydroxide (limewater) → calcium carbonate + water
Carbon dioxide dissolves in water to form carbonic acid (H2CO3).
Lime water is a solution of calcium hydroxide (Ca(OH)2).
They react to form calcium carbonate (CaCO3) and water. Calcium carbonate is insoluble and forms a white precipitate.
If CO2 continues to be passed, more carbonic acid forms, which then reacts with the calcium carbonate to form calcium hydrogencarbonate, which is soluble, so the precipitate is seen to dissolve.
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