What are the essentials of a chemical equation ?

Explanation

The significance of a chemical equation is as follows:
(i) Chemical equation describes briefly the names of the reactants, the products and the state of matter.
(ii) It explains the specific conditions of temperature, pressure, catalyst, etc. under which the reaction takes place.
(iii) It also states whether energy is evolved or needs to be supplied.
(iv) Chemical equation also represents the relative number of molecules and moles of reactants and products.
(v) The relative massaes of the reactants and products can also be calculated using a chemical equation. Thus, a chemical equation describes a chemical reaction qualitatively as well as quantitatively.