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A student dropped a few pieces of marble...

A student dropped a few pieces of marble chips in dilute hydrochloric acid contained in a test tube. The gas evolved was passed through lime water. What changes would be observed lime water ? Write the chemical equations for both the changes observed.

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`CaCO_3+2HCl to CaCl_2+H_2O+CO_2`
Marble is calcium carbonate and on reacting with HCL releases `CO_2`
`Ca(OH)_2+ CO_2 to CaCO_3+H_2O`
(Lime water) (White ppt)
Lime water turns milky due to the formation of white precipitate of `CaCO_3`. On passing excess `CO_2` milkiness, disappears because `Ca(HCO_3)_2` is formed which is soluble in water.
`CaCO_3+H_2O+CO_2 to Ca(HCO_3)_2` Soluble in water
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OSWAAL PUBLICATION-ACIDS,BASES AND SALTS -Topic-2 SHORT ANSWER TYPE QUESTION -II
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