CaCO3 + 2Na → Na2CO3 + CaO
In this reaction, the calcium carbonate decomposes into calcium oxide and carbon dioxide gas (CO2). The sodium metal then reacts with the carbon dioxide gas to form sodium carbonate. The overall reaction is exothermic, meaning that it releases heat.
The products of this reaction, sodium carbonate and calcium oxide, have different properties and uses. Sodium carbonate is a white, crystalline solid that is soluble in water. It is commonly used in the production of glass, detergents, and paper. Calcium oxide, also known as quicklime, is a white or grayish-white solid that is insoluble in water. It is used in the production of cement, mortar, and fertilizer.