Classifying Chemical Reactions Worksheet KEY - Classifying ... - Free Printable

To solve this problem, we need to balance each chemical equation and identify the type of reaction. Let's go through each one step by step.

1. Synthesis Reaction
- Unbalanced: \( \text{N}_2 + \text{H}_2 \rightarrow \text{NH}_3 \)
- Balanced: \( \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \)

2. Decomposition Reaction
- Unbalanced: \( \text{KClO}_3 \rightarrow \text{KCl} + \text{O}_2 \)
- Balanced: \( 2\text{KClO}_3 \rightarrow 2\text{KCl} + 3\text{O}_2 \)

3. Single Replacement Reaction
- Unbalanced: \( \text{NaCl} + \text{F}_2 \rightarrow \text{NaF} + \text{Cl}_2 \)
- Balanced: \( 2\text{NaCl} + \text{F}_2 \rightarrow 2\text{NaF} + \text{Cl}_2 \)

4. Double Replacement Reaction
- Unbalanced: \( \text{H}_2 + \text{O}_2 \rightarrow \text{H}_2\text{O} \)
- Balanced: \( 2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O} \)

5. Combustion Reaction
- Unbalanced: \( \text{Pb}(\text{OH})_2 + \text{HCl} \rightarrow \text{H}_2\text{O} + \text{PbCl}_2 \)
- Balanced: \( \text{Pb}(\text{OH})_2 + 2\text{HCl} \rightarrow 2\text{H}_2\text{O} + \text{PbCl}_2 \)

6. Double Replacement Reaction
- Unbalanced: \( \text{AlBr}_3 + \text{K}_2\text{SO}_4 \rightarrow \text{KBr} + \text{Al}_2(\text{SO}_4)_3 \)
- Balanced: \( 2\text{AlBr}_3 + 3\text{K}_2\text{SO}_4 \rightarrow 6\text{KBr} + \text{Al}_2(\text{SO}_4)_3 \)

7. Combustion Reaction
- Unbalanced: \( \text{CH}_4 + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} \)
- Balanced: \( \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \)

8. Combustion Reaction
- Unbalanced: \( \text{C}_3\text{H}_8 + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} \)
- Balanced: \( \text{C}_3\text{H}_8 + 5\text{O}_2 \rightarrow 3\text{CO}_2 + 4\text{H}_2\text{O} \)

9. Synthesis Reaction
- Unbalanced: \( \text{Fe} + \text{Cl}_2 \rightarrow \text{FeCl}_3 \)
- Balanced: \( 2\text{Fe} + 3\text{Cl}_2 \rightarrow 2\text{FeCl}_3 \)

10. Double Replacement Reaction
- Unbalanced: \( \text{Zn} + \text{HNO}_3 \rightarrow \text{Zn}(\text{NO}_3)_2 + \text{H}_2 \)
- Balanced: \( \text{Zn} + 2\text{HNO}_3 \rightarrow \text{Zn}(\text{NO}_3)_2 + \text{H}_2 \)

Final Answer:
1. \( \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \) (Synthesis)
2. \( 2\text{KClO}_3 \rightarrow 2\text{KCl} + 3\text{O}_2 \) (Decomposition)
3. \( 2\text{NaCl} + \text{F}_2 \rightarrow 2\text{NaF} + \text{Cl}_2 \) (Single Replacement)
4. \( 2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O} \) (Double Replacement)
5. \( \text{Pb}(\text{OH})_2 + 2\text{HCl} \rightarrow 2\text{H}_2\text{O} + \text{PbCl}_2 \) (Double Replacement)
6. \( 2\text{AlBr}_3 + 3\text{K}_2\text{SO}_4 \rightarrow 6\text{KBr} + \text{Al}_2(\text{SO}_4)_3 \) (Double Replacement)
7. \( \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \) (Combustion)
8. \( \text{C}_3\text{H}_8 + 5\text{O}_2 \rightarrow 3\text{CO}_2 + 4\text{H}_2\text{O} \) (Combustion)
9. \( 2\text{Fe} + 3\text{Cl}_2 \rightarrow 2\text{FeCl}_3 \) (Synthesis)
10. \( \text{Zn} + 2\text{HNO}_3 \rightarrow \text{Zn}(\text{NO}_3)_2 + \text{H}_2 \) (Double Replacement)