# What is an example of a balanced equation practice problem?

Apr 24, 2014

Let us begin with a very basic chemical reaction between nitrogen and hydrogen to create ammonia

The reaction is

${N}_{2} + {H}_{2} \to N {H}_{3}$

The first step is to take an atom inventory of both sides of the equation.

Reactants
N = 2
H = 2

Products
N = 1
H = 3

To balance the unbalanced atoms of nitrogen we add a coefficient of 2 in front of the ammonia on the product side.

${N}_{2} + {H}_{2} \to 2 N {H}_{3}$

This changes the atom inventory of both sides of the equation.

Reactants
N = 2
H = 2

Products
N = 2
H = 6

To complete balancing the equation we add a coefficient of 3 in front of the hydrogen on the reactant side.

${N}_{2} + 3 {H}_{2} \to 2 N {H}_{3}$

This changes the atom inventory of both sides of the equation.

Reactants
N = 2
H = 6

Products
N = 2
H = 6

And the equation is balanced.

Please review the video below to see more examples of balancing equations.