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what happens when nitric acid is added to egg shells?
It bubbles as it dissolves. The eggshell is mostly calcium carbonate. Carbonate compounds react with acids to liberate carbon dioxide gas.

CaCO3(s) + 2HCl(aq) --> CaCl2(aq) + CO2(g) + H2O(l)

Net ionic equation:

CaCO3(s) + 2H+ --> Ca2+ + CO2(g) + H2O(l)


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