Balancing Chemical Equations Worksheet

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🧪 What is Balancing Chemical Equations?

Chemical equations show what happens during a chemical reaction. The reactants (starting materials) are on the left side, and the products (what is made) are on the right side.

Balancing means making sure we have the same number of each type of atom on both sides of the equation. We add numbers called coefficients in front of the chemical formulas to balance them.

Example: H₂ + O₂ → H₂O becomes 2H₂ + O₂ → 2H₂O

1. Why do we need to balance chemical equations?

To make them look neat

Because atoms cannot be created or destroyed

To make the chemicals work faster

Because it's a rule we have to follow

⚖️ Practice Problems - Easy Level

2. Balance this equation by filling in the missing numbers:

_____ H₂ + _____ Cl₂ → _____ HCl

3. Balance this equation:

_____ Mg + _____ O₂ → _____ MgO

4. Balance this equation:

_____ N₂ + _____ H₂ → _____ NH₃

5. Which equation is already balanced?

H₂ + O₂ → H₂O

2H₂ + O₂ → 2H₂O

H₂ + 2O₂ → H₂O

3H₂ + O₂ → 2H₂O

🔬 Practice Problems - Moderate Level

6. Balance this combustion equation:

_____ C₃H₈ + _____ O₂ → _____ CO₂ + _____ H₂O

7. Balance this equation:

_____ Al + _____ CuSO₄ → _____ Al₂(SO₄)₃ + _____ Cu

8. Balance this equation:

_____ Fe + _____ O₂ → _____ Fe₂O₃

9. Check your work! Count the atoms on each side of your balanced equation from problem 6:

Left side: C = _____, H = _____, O = _____

Right side: C = _____, H = _____, O = _____

10. Explain in one sentence why it's important that the number of atoms is the same on both sides:

Balancing Chemical Equations Worksheet

Balancing Chemical Equations Worksheet

🧪 What is Balancing Chemical Equations?

⚖️ Practice Problems - Easy Level

🔬 Practice Problems - Moderate Level

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