Chemistry Year 12 - Module 5 - Lesson 6

Le Chatelier's Principle — Pressure, Volume & Catalysts

Use this worksheet after reading the lesson to practise the key ideas and prove you can meet the success criteria.

Name

Date

Class

1. Key Ideas

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Key facts and terms for Le Chatelier's Principle — Pressure, Volume & Catalysts
How the main ideas in Le Chatelier's Principle — Pressure, Volume & Catalysts connect

2. Success Criteria

By the end, you should be able to:

Key facts and terms for Le Chatelier's Principle — Pressure, Volume & Catalysts
Where this lesson fits in Module 5
How the main ideas in Le Chatelier's Principle — Pressure, Volume & Catalysts connect

3. Key Terms

Catalyst ruleA substance that increases reaction rate by providing an alternative pathway with lower activation energy.

Dynamic equilibriumA state where forward and reverse reaction rates are equal.

Equilibrium constant (Keq)The ratio of product to reactant concentrations at equilibrium.

Le Chatelier's PrincipleA system at equilibrium shifts to minimise applied disturbances.

Reaction quotient (Q)The ratio of product to reactant concentrations at any instant.

Solubility product (Ksp)The equilibrium constant for dissolution of a sparingly soluble salt.

4. Activity: Build the Lesson Map

Use the lesson to complete the table. Keep answers brief but specific.

Prompt	Your answer
Main concept
Important example
Common mistake to avoid
How this links to the next lesson

5. Short Answer Questions

1. Explain this lesson goal in your own words: "Key facts and terms for Le Chatelier's Principle — Pressure, Volume & Catalysts". Use one specific example from the lesson.

Band 32 marks

2. Apply this idea to a new example: "Where this lesson fits in Module 5". Show your reasoning clearly.

Band 43 marks

3. Analyse why this idea matters for understanding Le Chatelier's Principle — Pressure, Volume & Catalysts: "How the main ideas in Le Chatelier's Principle — Pressure, Volume & Catalysts connect".

Band 54 marks

6. Extend: Apply the Idea

Band 5/65 marks

A student gives a memorised answer about Le Chatelier's Principle — Pressure, Volume & Catalysts but does not use evidence or reasoning.

Improve the answer by writing a stronger response that uses accurate terminology, a relevant example and a clear explanation.

7. Multiple Choice

1. What is the best first step when answering a question about Le Chatelier's Principle — Pressure, Volume & Catalysts?

A. Identify the key concept being tested

B. Write every fact from memory

C. Ignore the command word

D. Skip examples and evidence

2. Which answer would show stronger understanding of Le Chatelier's Principle — Pressure, Volume & Catalysts?

A. An answer with accurate terms and reasoning

B. A copied definition only

C. A single-word response

D. An answer with no example

3. What should you do if a question asks you to explain?

A. Link the idea to a reason or cause

B. List unrelated facts

C. Only draw a diagram

D. Write the shortest possible answer

8. Success Criteria Proof

Finish with evidence that you can do each success criterion.

Success criterion 1

Prove that you can: Key facts and terms for Le Chatelier's Principle — Pressure, Volume & Catalysts