Final answer:
Stoichiometry synthesis of CaCO3 involves the reaction of CaO and CO2 to form CaCO3, demonstrating the conservation of mass with the mass of reactants equalling the mass of products.
Step-by-step explanation:
The stoichiometry synthesis of calcium carbonate involves the reaction between calcium oxide (CaO) and carbon dioxide (CO2) to form calcium carbonate (CaCO3). The balanced chemical equation for this reaction is CaO(s) + CO2(g) → CaCO3(s). When carrying out this reaction under conditions where the CO2 can escape, it is possible to achieve a 100% yield of calcium oxide, as seen in the decomposition of calcium carbonate to calcium oxide and carbon dioxide.
By heating 10.0 grams of calcium carbonate, if one observes the formation of 4.4 g of carbon dioxide and 5.6 g of calcium oxide, these results demonstrate the law of conservation of mass. This is because the mass of the reactants equals the mass of the products, confirming that mass is conserved in a chemical reaction. According to this law, no atoms are lost or gained during a chemical reaction; they are merely rearranged, which is evident from the aforementioned equilibrium.
In a practical scenario, if 100 g of solid calcium carbonate and 50 g of calcium oxide are placed in an evacuated round bottom flask and heated to 35°C with a resulting pressure of 0.5 atm, stoichiometry can also be used to calculate the changes occurring within this closed system.