Chemistry
Give a reason why carbon dioxide and sulphur dioxide cannot be distinguished by using lime water.
Practical Chemistry
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Answer
Both, carbon dioxide and sulphur dioxide turns lime water milky due to the formation of CaCO3 and CaSO3, respectively. Hence, lime water cannot be used to distinguish between the two.
Ca(OH)2 + CO2 ⟶ CaCO3 ↓ [white ppt. - insoluble] + H2O
Ca(OH)2 + SO2 ⟶ CaSO3 ↓ [white ppt. - insoluble] + H2O
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