Practice Balancing Equations in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The process of adjusting the coefficients (the numbers placed before chemical formulas) in a chemical equation so that the number of atoms of each element.

Atoms can't appear or disappear — every atom on the left must show up on the right.

Example 1

easy
Balance the equation: \text{Fe} + \text{O}_2 \rightarrow \text{Fe}_2\text{O}_3.

Example 2

medium
Balance: \text{C}_3\text{H}_8 + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O}.

Example 3

medium
Balance: \text{Al} + \text{HCl} \rightarrow \text{AlCl}_3 + \text{H}_2.

Example 4

medium
Balance the equation for the formation of ammonia: \text{N}_2 + \text{H}_2 \rightarrow \text{NH}_3.
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