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Chemical Reaction Types

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Chemical Reaction Types

Chemical Reaction Types

Name:

Date:

Chemical reactions illustration

🧪 Part 1: Identifying Reaction Types

1. Match each reaction type with its correct description:

1. Synthesis

2. Decomposition

3. Single Replacement

4. Double Replacement

5. Combustion

A. One element replaces another in a compound

B. Two or more reactants combine to form one product

C. Exchange of ions between two compounds

D. One reactant breaks down into two or more products

E. Reaction with oxygen producing CO₂ and water

2. Which reaction type requires energy input to break bonds?

Synthesis

Decomposition

Combustion

Single Replacement

⚗️ Part 2: Classifying Chemical Reactions

3. Classify each of the following reactions. Write the reaction type on the line provided:

a) 2H₂ + O₂ → 2H₂O

Reaction type: ________________________

b) 2H₂O → 2H₂ + O₂

Reaction type: ________________________

c) Zn + CuSO₄ → ZnSO₄ + Cu

Reaction type: ________________________

d) AgNO₃ + NaCl → AgCl + NaNO₃

Reaction type: ________________________

e) CH₄ + 2O₂ → CO₂ + 2H₂O

Reaction type: ________________________

4. Circle all the characteristics that apply to combustion reactions:

Always involves oxygen

Produces carbon dioxide

Produces water

Requires a fuel source

Always produces light

Can release heat energy

🌍 Part 3: Real-Life Applications

5. Fill in the blanks with the correct reaction type:

a) When you burn petrol in a car engine, this is an example of a _____________ reaction.

b) Photosynthesis, where plants combine carbon dioxide and water to make glucose, is an example of a _____________ reaction.

c) When electrolysis breaks water into hydrogen and oxygen gases, this is a _____________ reaction.

d) When iron nails are placed in copper sulfate solution and copper metal forms, this is a _____________ reaction.

6. Explain how the law of conservation of mass applies to chemical reactions:

🔬 Part 4: Problem Solving

7. Create a word equation for each reaction type using the examples provided:

Synthesis: Sodium + Chlorine → _________________

Decomposition: Calcium carbonate → _________________ + _________________

Single Replacement: Magnesium + _________________ → Magnesium chloride + Hydrogen

Double Replacement: Silver nitrate + Sodium chloride → _________________ + _________________

8. Draw a simple diagram showing how atoms rearrange in a synthesis reaction (A + B → AB):

9. Which reaction type is most commonly used in:

a) Car engines and heating systems: _________________

b) Metal extraction from ores: _________________

c) Making new compounds in industry: _________________

d) Breaking down waste materials: _________________

📝 Part 5: Critical Thinking

10. Explain why combustion reactions are important in everyday life. Give three specific examples:

11. A student says: "In a chemical reaction, atoms disappear and new atoms are created." Explain why this statement is incorrect:

12. Self-Assessment: Rate your understanding using the traffic light system:

🔴 Red - I need help understanding reaction types

🟡 Amber - I'm almost there but need more practice

🟢 Green - I'm confident with identifying and classifying reaction types

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