Worksheet for identifying and balancing chemical reactions, including types of reactions and a molecular diagram.

1) K + Cl₂ → KCl
Type of Reaction: Combination
Balanced: 2K + Cl₂ → 2KCl

2) NH₃ → N₂ + H₂
Type of Reaction: Decomposition
Balanced: 2NH₃ → N₂ + 3H₂

3) NaF + Br₂ → NaBr + F₂
Type of Reaction: Single Replacement
Balanced: 2NaF + Br₂ → 2NaBr + F₂

4) SiO₂ + Li₄Se → Li₂Si + SeO₂
Type of Reaction: Double Replacement
Balanced: SiO₂ + Li₄Se → Li₂Si + SeO₂ (already balanced)

5) PbSO₄ → PbO + SO₃
Type of Reaction: Decomposition
Balanced: PbSO₄ → PbO + SO₃ (already balanced)

6) Al + FeCl₃ → Fe + AlCl₃
Type of Reaction: Single Replacement
Balanced: Al + FeCl₃ → Fe + AlCl₃ (already balanced)

7) SF₆ → S + F₂
Type of Reaction: Decomposition
Balanced: SF₆ → S + 3F₂

8) C₆H₁₂ + O₂ → CO₂ + H₂O
Type of Reaction: Combustion
Balanced: C₆H₁₂ + 9O₂ → 6CO₂ + 6H₂O

9) KClO₃ → KCl + O₂
Type of Reaction: Decomposition
Balanced: 2KClO₃ → 2KCl + 3O₂

10) Pb(NO₃)₂ + NaCl → NaNO₃ + PbCl₂
Type of Reaction: Double Replacement
Balanced: Pb(NO₃)₂ + 2NaCl → 2NaNO₃ + PbCl₂

11) Type of reaction shown in the left: Combination

12) Complete chemical formula above: 2C + O₂ → 2CO

13) Balanced equation: 2C + O₂ → 2CO