What is the reaction of calcium carbonate with sufficient hydrochloric acid?

1 Answer
Truong-Son N.
Jan 26, 2018

If you have the decomposition equilibrium

#"CaCO"_3(s) rightleftharpoons "CO"_2(g) + "CaO"(aq)#

then the #"HCl"# would react with the basic #"CaO"#. You should end up with #"CaCl"_2(aq)# eventually.

#"CaO"(aq) + 2"HCl"(aq) -> "CaCl"_2(aq) + "H"_2"O"(l)#

As you add it, it will consume #"CaO"#, thus pushing the equilibrium forward until all the #"CaCO"_3(s)# is gone.

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