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calcium nitrate,co2,h2o
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Observation: A brisk effervescence is seen and a gas which turns lime water milky and extinguishes a glowing splinter is evolved.
Nitric Acid reacts with egg shell to form calcium nitrate, carbon dioxide and water.
Equ:
CaCO3 [s] + 2HNO3 [aqu] --------> Ca(NO3)2 [aqu] +CO2 [g] + H2O [l]
Egg shell + Nitric Acid --------> Calcium Nitrate + Carbon dioxide + Water
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