Chemical Reactions Worksheet

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Date:

🔄 Do It Now - Retrieval Practice

WALT: We Are Learning To identify different types of chemical reactions and write equations

1. What are the three states of matter? (Previous topic)

_____________, _____________, _____________

2. Complete this word equation from last lesson:

Magnesium + Oxygen → _____________

3. What is a chemical reaction? (Circle the best answer)

When substances change colour only

When new substances are formed

When substances get hot

⚗️ Types of Chemical Reactions

4. Match each reaction type to its description:

Combustion

Decomposition

Synthesis

Two or more substances combine

Burning in oxygen

One substance breaks down

5. Identify the reaction type for each example:

a) Methane + Oxygen → Carbon dioxide + Water

Type: _____________

b) Hydrogen + Chlorine → Hydrogen chloride

Type: _____________

6. Extension: Write a word equation for the decomposition of water using electricity.

🔄 Reversible vs Irreversible Reactions

7. Which of these are signs of an irreversible reaction? (Tick all that apply)

Gas is produced

Change in temperature

New colour appears

Melting ice

8. Complete this reversible reaction equation:

Copper sulfate + Water ⇌ Hydrated copper sulfate

What does the ⇌ symbol mean? _____________

9. Scaffolded: Explain why burning wood is irreversible. Use these words:

Word bank: ash, smoke, heat, cannot, new substances

10. Challenge: Design an experiment to show a reversible reaction using copper sulfate crystals.

Success Criteria:

🟢 I can identify combustion, synthesis and decomposition reactions

🟢 I can write simple word equations

🟢 I can distinguish between reversible and irreversible reactions

🟢 I can explain my answers using scientific vocabulary

Chemical Reactions Worksheet

Chemical Reactions Worksheet

🔄 Do It Now - Retrieval Practice

⚗️ Types of Chemical Reactions

🔄 Reversible vs Irreversible Reactions

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