Write the reaction equation: KClO3- O2- CaO- CaCO3- CO2- H2CO3- H2

To carry out the above reactions in the chain, we need to carry out the following reactions.

The first is the reaction of dissociation of potassium chlorate into a potassium chloride salt and oxygen. The molecular equation of the reaction is as follows:

2 KClO3 = 2 KCl + 3 O2
Second, the reaction of interaction of substances such as calcium and oxygen. As a result of the reaction, calcium oxide is formed. The molecular equation of the reaction is as follows:

2 Ca + O2 = 2 CaO
Third, the reaction of interaction of substances such as calcium oxide and carbon dioxide. As a result of the reaction, calcium carbonate is formed. The molecular equation of the reaction is as follows:

CaO + CO2 = CaCO3
Further, the reaction of interaction of substances such as calcium carbonate and hydrochloric acid. As a result of the reaction, calcium chloride salt, water and carbon dioxide are formed.

CaCO3 + 2 HCl = CaCl2 + H2O + CO2
And the last reaction is the reaction between carbon dioxide and water. As a result of the reaction, carbonic acid is formed.

CO2 + H2O = H2CO3.