Question

Calcium oxide is a base. It combines with solid, acidicoxides in the basic oxygen furnace. Write a chemical equation for one of these oxides reacting with the added lime.

a) CaO+SO2→CaSO3
b) CaO+CO2→CaCO3
c) CaO+NO2→Ca(NO3)2
d) CaO+P2O5→Ca3(PO4)2

Answer 1

The correct answer is b) CaO+CO2→CaCO3

Step-by-step explanation:

The correct answer is b) CaO+CO2→CaCO3. When calcium oxide (CaO) combines with carbon dioxide (CO2), it forms calcium carbonate (CaCO3). This reaction is commonly known as the formation of limestone.