Question

What is a chemical equation? Explain with the help of an example.

Answer 1

A chemical reaction is a process that results in the chemical change of one set of chemical substances into another set of chemical substances. Chemical reactions are often defined as changes in the locations of electrons in the formation and breaking of chemical bonds between atoms, with no change in the nuclei (no change in the elements present), and may be represented using a chemical equation.

Complete answer:
A chemical equation is a symbolically represented chemical reaction in the form of symbols and formulas, with the reactant entities on the left and the product entities on the right. The absolute values of the stoichiometric numbers are represented by the coefficients adjacent to the symbols and formulas of things. The chemical formulae of the reactants (the beginning substances) and the chemical formula of the products make up a chemical equation (substances formed in the chemical reaction). An arrow symbol ($\to$commonly interpreted as "yields") separates the two, while a plus sign separates each particular substance's chemical formula from the others.
$2\;HCl\; + {\text{ }}2\;Na\; \to {\text{ }}2\;NaCl\; + \;{H_2}$
The equation describing the reaction of hydrochloric acid with sodium, for example, can be represented. "Two HCl with two Na generates two NaCl and H two," reads the equation. However, rather than reading the letter and its subscript, IUPAC nomenclature is used to interpret chemical formulae in equations involving complicated compounds. This equation would be written as "hydrochloric acid plus sodium generates sodium chloride and hydrogen gas" in IUPAC nomenclature. According to this equation, sodium and HCl combine to create NaCl and ${H_2}$.

Note:
According to this equation, sodium and HCl combine to create NaCl and ${H_2}$. It also shows that for every two hydrochloric acid molecules, two sodium chloride molecules and one diatomic molecule of hydrogen gas are formed, and for every two hydrochloric acid and two sodium molecules that react, two sodium chloride molecules and one diatomic molecule of hydrogen gas are formed. The law of conservation of mass and the law of conservation of charge give rise to the stoichiometric coefficients.