What happens when carbon dioxide gas is bubbled through lime water? (a) In small amount, (b) In excess?
What happens when carbon dioxide gas is bubbled through lime water?
(a) In small amount,
(b) In excess?
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(a) In small amount, solution becomes milky due to the formation of calcium carbonate.
Ca(OH)2 + CO2 → CaCO3 + H2O.
(b) In excess, milkiness disappears because calcium carbonate changes to calcium hydrogen carbonate which is colourless in nature
CaCO3 + H2O + CO2 → Ca (HCO3)2
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