ICSE Class 6 Answered
why do lime water turns milky when it comes in contact with exhaled air?
Asked by mayurimjainatoz | 27 Mar, 2022, 16:59: PM
Expert Answer
Clear, colorless limewater absorbs carbon dioxide readily from exhaled air, giving a milky solution. This is due to the insoluble suspension of calcium carbonate formed:
- Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)
If excess CO2 is added, the following reaction takes place:
- CaCO3(s) + H2O(l) + CO2(g) → Ca(HCO3)2(aq)
Answered by Ramandeep | 28 Mar, 2022, 11:26: AM
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