What is observed when carbon dioxide gas is passed through lime water for short and long duration.
VENDETTA007:
turns milky if passed for short duration and colourless if passed for long duration.
Ho know
checked in lab
we don't have lab in our school
then take my word for it. I have checked it.
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lime water turns milky during this process when for short time
colureles when for long time
colureles when for long time
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Solution:
i) For short duration:
When calcium hydroxide(lime water) solution reacts with carbon dioxide gas,the Limewater turns milky due to the formation of a white precipitate of calcium carbonate (CaCO3) which is insoluble in water.
Ca(OH)2(aq) + CO2(g) ------> CaCO3 (s) + H2O(l)
ii) for long duration:
When excess of carbon dioxide gas is passed through lime water then the white precipitate calcium carbonate formed first dissolves due to the formation of a soluble salt calcium hydrogen carbonate (Ca(HCO3)2, and the Solution becomes clear again.
CaCO3 (s) + H2O(l) + CO2(g) ------> Ca(HCO3)2.
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