What is the reaction of the decomposition of calcium carbonate?

1 Answer

Calcium carbonate will decompose to form carbon dioxide and calcium oxide.

Carbonate compounds will decompose when heated.

Here is the balanced equation for this reaction:
#CaCO_3#(s) -> CaO(s) + #CO_2#(g)

Calcium carbonate has a 1:1 ratio because calcium forms a +2 ion and carbonate has a -2 charge.

Calcium oxide must have the formula CaO because calcium forms an ion with a +2 charge and oxide has a -2 charge.