A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water. What change would be observed in lime water? Write balanced chemical equation for both the change observed?
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Limestone = CaCO₃
CaCO₃ + 2HCl-----------> CaCl₂ + CO₂ + H₂O
When CO₂ is passed through lime water it turns milky
Ca(OH)₂ + CO₂-------------------------> CaCO₃ + H₂O
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