Calcium carbonate decomposes on heating to form calcium oxide and carbon dioxide

cbse
atomsandmolecules

#1

Calcium carbonate decomposes on heating to form calcium oxide and carbon dioxide. When 10 g of calcium carbonate is decomposed completely then 5.6 g of calcium oxide is formed? Calculate the mass of carbon dioxide formed. Which law of chemical combination will you use in solving this problem? State the law.


#2

The reaction occurs as follows:
$CaC{{O}{3}}$ --------------------> CaO + C02
According to the law of conservation of mass,
Total mass of reactant(s) = Total mass of products (s)
=> 10 g = 5.6 g + Mass of $C{{O}
{2}}$
=> Mass of C02 = 10 - 5.6 = 4.4 g
This problem is solved using law of conservation of mass according to which mass can neither be created nor be destroyed during a chemical reaction.