Chemical Equilibria

• Chemistry
• Secondary Education

Self-check:
How do you feel today?

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• Reversible reaction
• "Closed system"
• Dynamic equilibrium

FOCUS CONCEPTS

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• Why is a "closed system" needed in order to establish a dynamic equilibrium?

FOCUS QUESTION

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Which of the following refers to the state of a system in which the concentration of the reactant is equal to the concentration of the products and no further change in properties is observed?

1. chemical reaction
2. chemical equilibrium
3. chemical system
4. chemical change

Is this reversible or irreversible?

Why is the reaction reversible?

Is this a reversible reaction?

Is this a reversible reaction?

NO

Does this happen in a closed system?

Does this happen in a closed system?

NO

Is this a reversible reaction?

Is this a reversible reaction?

YES

Does this happen in a closed system?

Does this happen in a closed system?

YES

Conclusion:
Reversible reactions happen in a closed system.

TRUE

FALSE

• Goal: get a visual feel of how dynamic equilibrium works
• Expectation: finish the task in 10 minutes
• Tie-up: answer the focus question

GROUP ACTIVITY (G.E.T.)

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• Why is a "closed system" needed in order to establish a dynamic equilibrium?

FOCUS QUESTION

?

• Why is a "closed system" needed in order to establish a dynamic equilibrium?

FOCUS QUESTION

?

Why is a "closed system" needed in order to establish a dynamic equilibrium?

Self-evaluation:
Rate your participation and understanding of the lesson.

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