Le Chatelier's Principle Worksheet
Grade 12 Chemistry worksheet on Le Chatelier's Principle, covering factors affecting equilibrium and predicting shifts.
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Le Chatelier's Principle Worksheet
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Read each question carefully and answer to the best of your ability. Apply Le Chatelier's Principle to predict the shift in equilibrium for each scenario.
1. Consider the following reversible reaction at equilibrium: 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) + Heat If the temperature of the system is increased, which of the following will occur?
The equilibrium will shift to the right, favoring product formation.
The equilibrium will shift to the left, favoring reactant formation.
The equilibrium will remain unchanged.
The reaction rate will decrease for both forward and reverse reactions.
2. For the reaction: N₂(g) + 3H₂(g) ⇌ 2NH₃(g) If the pressure of the system is increased by decreasing the volume, how will the equilibrium shift?
Towards the reactants.
Towards the products.
No shift in equilibrium.
The reaction will stop.
3. According to Le Chatelier's Principle, if a stress is applied to a system at equilibrium, the system will shift in a direction that the stress.
4. Adding a catalyst to a reversible reaction at equilibrium will the rates of both the forward and reverse reactions, but will not affect the position of the equilibrium.
5. For an endothermic reaction, increasing the temperature will cause the equilibrium to shift to the .
6. Removing a product from a system at equilibrium will cause the equilibrium to shift towards the reactants.
True
False
7. Increasing the concentration of a reactant will always shift the equilibrium to the right.
True
False
8. For the reaction: CO(g) + Cl₂(g) ⇌ COCl₂(g) Explain how increasing the concentration of CO(g) will affect the equilibrium position and the concentration of COCl₂(g).
9. Consider the reaction: N₂O₄(g) ⇌ 2NO₂(g) (ΔH = +57.2 kJ/mol) Describe the effect of decreasing the volume of the reaction vessel on the equilibrium position and the amount of NO₂(g).
For each of the following reactions and applied stresses, predict whether the equilibrium will shift to the LEFT, RIGHT, or remain UNCHANGED. Explain your reasoning.
10. H₂(g) + I₂(g) ⇌ 2HI(g) (Exothermic) Stress: Addition of H₂
Shift:
Reasoning:
11. PCl₅(g) ⇌ PCl₃(g) + Cl₂(g) (Endothermic) Stress: Decrease in temperature
Shift:
Reasoning:
12. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) Stress: Addition of a catalyst
Shift:
Reasoning:
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