Question

I cannot understand how to balance chemical equations.

Answer 1

A chemical equation is a written symbolic representation of a chemical reaction. The reactant chemical(s) are given on the left-hand side and the product chemical(s) on the right-hand side. The two are connected with an arrow leading from the left to the right, symbolizing the reaction. The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, so the number of atoms that are present in the reactants has to balance the number of atoms that are present in the products. Follow this guide to learn how to balance chemical equations differently.
Example: $Fe+H_{2}O⟶F{e}_3{O}_4+H_2$
1. List the number of atoms of different elements present in the unbalanced equation.
Elements Reactant Product
Fe 1 3
H 2 2
O 1 4
Balanced equation:
Elements Reactant Product
Fe $1\times 3$ 3

H $4\times 2=8$ $4\times 2=8$

O $1\times 4=4$ 4
Balanced equation will be: $3Fe+4H_{2}O⟶F{e}_3{O}_4+4H_2$