Chemical reactions, in which compounds are formed or transformed, are represented by chemical equations. Chemical reaction is "any combination of two or more chemical substances if the combination does not occur in nature and is not, in whole or in part, the result of a chemical reaction."
The following are the steps involved in writing a Chemical Reaction Formula.
- Write the word equation of the reaction.
- Write the formula of the reactants on the left side in equation.
- Write the formula of the products on the right side in equation.
- If there are two or more reactants or products then write plus (+) sign in between them.
- Show the direction of the reaction with an arrow($\rightarrow$) between reactants and products.
- The equation thus obtained is called the skeleton equation.
Thus the chamical reaction can be represented by an equation using symbols, formulas and signs.