CO2 gas is passed through lime water. Write the chemical equation to show the change.
(a) What happens if excess CO2 is passed through lime water?
(b) What is the product formed?
(c) How will you represent the reaction?
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Explanation:
Answer:- formation of water soluble calcium bicarbonate
When CO2 is passed through lime water, it turns milky due to the formation of calcium carbonate which is insoluble in water.
Ca(OH)2+CO2 ⟶ CaCO3(milkiness)+H2O(water
However, when excess of CO2 is passed through this solution, the milkiness disappears. This is due to the formation of calcium bicarbonate which is colorless and soluble in water.
CaCO3(milkiness) +H2O+CO2(excess)
⟶
Ca(HCO3)2(water soluble)
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