Chemistry Balancing Chemical Equations Worksheet

Adolfo Arranz

less than a minute read

·

28-11-2024

17

0

Share

This worksheet provides practice in balancing chemical equations, a fundamental skill in chemistry. Remember that balancing equations ensures adherence to the law of conservation of mass – matter is neither created nor destroyed in a chemical reaction. The number of atoms of each element must be equal on both the reactant and product sides of the equation.

Instructions

Balance the following chemical equations by inserting coefficients where necessary. Do not change the subscripts within the chemical formulas. Remember that a coefficient multiplies all the atoms within a given molecule.

Example:

Unbalanced: H₂ + O₂ → H₂O

Balanced: 2H₂ + O₂ → 2H₂O

Practice Problems

1. Fe + O₂ → Fe₂O₃

2. C₃H₈ + O₂ → CO₂ + H₂O

3. Al + HCl → AlCl₃ + H₂

4. NaOH + H₂SO₄ → Na₂SO₄ + H₂O

5. KClO₃ → KCl + O₂

6. AgNO₃ + Cu → Cu(NO₃)₂ + Ag

7. N₂ + H₂ → NH₃

8. CH₄ + Cl₂ → CCl₄ + HCl

9. P₄ + O₂ → P₄O₁₀

10. Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + H₂O

Answers (Check Your Work)

The following are the balanced chemical equations. It is crucial to understand the process of balancing, not just memorizing these answers. If you are struggling, review the rules and examples provided in your textbook or lecture notes. Focus on balancing one element at a time, often starting with those that appear in only one reactant and one product.

1. 4Fe + 3O₂ → 2Fe₂O₃

2. C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

3. 2Al + 6HCl → 2AlCl₃ + 3H₂

4. 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

5. 2KClO₃ → 2KCl + 3O₂

6. 2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag

7. N₂ + 3H₂ → 2NH₃

8. CH₄ + 4Cl₂ → CCl₄ + 4HCl

9. P₄ + 5O₂ → P₄O₁₀

10. 3Ca(OH)₂ + 2H₃PO₄ → Ca₃(PO₄)₂ + 6H₂O

Further Practice

For more practice, search online for "balancing chemical equations worksheets" or consult your chemistry textbook for additional exercises. Mastering this skill is essential for success in subsequent chemistry topics. Good luck!