Balancing Equations Worksheet
Name: __________________________
Date: __________________________
Class: __________________________
Instructions
Balance each equation by writing the correct whole-number coefficient in each blank. Remember: the number of each type of atom must be the same on both sides.
A. Easy Level
- ___ H₂ + ___ O₂ → ___ H₂O
- ___ H₂ + ___ Cl₂ → ___ HCl
- ___ Na + ___ Cl₂ → ___ NaCl
- ___ Mg + ___ O₂ → ___ MgO
- ___ Ca + ___ O₂ → ___ CaO
- ___ N₂ + ___ H₂ → ___ NH₃
- ___ K + ___ Cl₂ → ___ KCl
- ___ Al + ___ O₂ → ___ Al₂O₃
- ___ C + ___ O₂ → ___ CO₂
- ___ S + ___ O₂ → ___ SO₂
B. Intermediate Level
- ___ CH₄ + ___ O₂ → ___ CO₂ + ___ H₂O
- ___ C₂H₆ + ___ O₂ → ___ CO₂ + ___ H₂O
- ___ C₃H₈ + ___ O₂ → ___ CO₂ + ___ H₂O
- ___ Fe + ___ O₂ → ___ Fe₂O₃
- ___ Al + ___ HCl → ___ AlCl₃ + ___ H₂
- ___ Zn + ___ HCl → ___ ZnCl₂ + ___ H₂
- ___ Na + ___ H₂O → ___ NaOH + ___ H₂
- ___ Ca + ___ H₂O → ___ Ca(OH)₂ + ___ H₂
- ___ KClO₃ → ___ KCl + ___ O₂
- ___ H₂O₂ → ___ H₂O + ___ O₂
C. More Practice
- ___ CO + ___ O₂ → ___ CO₂
- ___ NO + ___ O₂ → ___ NO₂
- ___ SO₃ → ___ SO₂ + ___ O₂
- ___ Fe + ___ HCl → ___ FeCl₂ + ___ H₂
- ___ CuO + ___ H₂ → ___ Cu + ___ H₂O
- ___ Mg + ___ HCl → ___ MgCl₂ + ___ H₂
- ___ NaOH + ___ HCl → ___ NaCl + ___ H₂O
- ___ CaCO₃ → ___ CaO + ___ CO₂
- ___ NH₃ + ___ O₂ → ___ N₂ + ___ H₂O
- ___ CH₃OH + ___ O₂ → ___ CO₂ + ___ H₂O
D. Challenge Level
- ___ C₂H₅OH + ___ O₂ → ___ CO₂ + ___ H₂O
- ___ C₄H₁₀ + ___ O₂ → ___ CO₂ + ___ H₂O
- ___ Fe₂O₃ + ___ CO → ___ Fe + ___ CO₂
- ___ Al + ___ Fe₂O₃ → ___ Al₂O₃ + ___ Fe
- ___ Na₂O + ___ H₂O → ___ NaOH
- ___ P + ___ O₂ → ___ P₂O₅
- ___ H₂S + ___ O₂ → ___ SO₂ + ___ H₂O
- ___ C₂H₄ + ___ O₂ → ___ CO₂ + ___ H₂O
- ___ C₃H₈ + ___ O₂ → ___ CO₂ + ___ H₂O
- ___ N₂ + ___ H₂ → ___ NH₃
Answer Key
- 2H₂ + O₂ → 2H₂O
- H₂ + Cl₂ → 2HCl
- 2Na + Cl₂ → 2NaCl
- 2Mg + O₂ → 2MgO
- 2Ca + O₂ → 2CaO
- N₂ + 3H₂ → 2NH₃
- 2K + Cl₂ → 2KCl
- 4Al + 3O₂ → 2Al₂O₃
- C + O₂ → CO₂
- S + O₂ → SO₂
- CH₄ + 2O₂ → CO₂ + 2H₂O
- 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
- C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
- 4Fe + 3O₂ → 2Fe₂O₃
- 2Al + 6HCl → 2AlCl₃ + 3H₂
- Zn + 2HCl → ZnCl₂ + H₂
- 2Na + 2H₂O → 2NaOH + H₂
- Ca + 2H₂O → Ca(OH)₂ + H₂
- 2KClO₃ → 2KCl + 3O₂
- 2H₂O₂ → 2H₂O + O₂
- 2CO + O₂ → 2CO₂
- 2NO + O₂ → 2NO₂
- 2SO₃ → 2SO₂ + O₂
- Fe + 2HCl → FeCl₂ + H₂
- CuO + H₂ → Cu + H₂O
- Mg + 2HCl → MgCl₂ + H₂
- NaOH + HCl → NaCl + H₂O
- CaCO₃ → CaO + CO₂
- 4NH₃ + 3O₂ → 2N₂ + 6H₂O
- 2CH₃OH + 3O₂ → 2CO₂ + 4H₂O
- C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
- 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O
- Fe₂O₃ + 3CO → 2Fe + 3CO₂
- 2Al + Fe₂O₃ → Al₂O₃ + 2Fe
- Na₂O + H₂O → 2NaOH
- 4P + 5O₂ → 2P₂O₅
- 2H₂S + 3O₂ → 2SO₂ + 2H₂O
- C₂H₄ + 3O₂ → 2CO₂ + 2H₂O
- C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
- N₂ + 3H₂ → 2NH₃