Balance the equation: $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2+{\mathrm{CO}}_2\to {\mathrm{CaCO}}_3+{\mathrm{H}}_2\mathrm{O}$

Balanced chemical equation:

1. Chemical equations are symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae.
2. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.
3. The Law of conservation of mass governs the balancing of a chemical equation.
4. According to this law, mass can neither be created nor be destroyed in a chemical reaction, and obeying this law total mass of the elements or molecules present on the reactant side should be equal to the total mass of elements or molecules present on the product side.
5. If the chemical equation is not balanced law of conservation is not applicable

Given equation:

1. An insoluble milky white precipitate of calcium carbonate and water is produced when calcium hydroxide reacts with carbon dioxide gas.
2. The reaction follows a double displacement reaction.

Balanced chemical equation:

1. 1 mole of calcium hydroxide reacts with 1 mole of carbon oxide to produce 1 mole of calcium carbonate and 1 mole of water.
2. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2+{\mathrm{CO}}_2\to {\mathrm{CaCO}}_3+{\mathrm{H}}_2\mathrm{O}$

This is the balanced chemical equation as the reaction is already balanced.