18) Explain the chemical reaction occurring when carbon dioxide is passed through decanted solution of limewater.
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18) Explain the chemical reaction occurring when carbon dioxide is passed through decanted solution of limewater.
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Answer:
Resultant carbon dioxide passed through limewater in the right tube, producing a milky solution due to precipitation of the insoluble suspension of calcium carbonate: Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O. ... The milkiness disappears since calcium bicarbonate is water-soluble
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Explanation:
The reaction between carbon dioxide and lime water is as follow :
Carbon dioxide (CO2) + Lime water [Ca(OH)2] = Calcium Carbonate (CaCO3) + Water (H2O).
When carbon dioxide is passed through lime water , calcium carbonate is formed, which makes lime water milky. The turning of lime water into milky is a standard test of carbon dioxide.
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