Le Chatelier’s Principle
Chemistry ⇒ Chemical Kinetics and Equilibrium
Le Chatelier’s Principle starts at 11 and continues till grade 12.
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Describe the effect of decreasing the concentration of a reactant on the position of equilibrium.
Describe the effect of increasing temperature on an endothermic reaction at equilibrium.
Describe the effect of removing a reactant from a system at equilibrium.
Describe what happens to the equilibrium position if an inert gas is added to a reaction mixture at constant volume.
Explain how the addition of a catalyst affects the position of equilibrium according to Le Chatelier’s Principle.
Explain why increasing the pressure has no effect on the equilibrium position of a reaction where the number of moles of gas is the same on both sides.
Explain why Le Chatelier’s Principle does not predict the extent of the shift, only the direction.
Explain why Le Chatelier’s Principle is important in industrial chemical processes.
Explain why the addition of an inert gas at constant pressure can affect the position of equilibrium in a gaseous reaction.
For the reaction: 2A(g) ⇌ B(g) + C(g), if the volume of the container is doubled, what happens to the equilibrium?
For the reaction: 2HI(g) ⇌ H2(g) + I2(g), what will be the effect of decreasing the volume of the container?
For the reaction: 2NO2(g) ⇌ N2O4(g), what will be the effect of increasing the pressure?
For the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), if the temperature is decreased, what happens to the equilibrium if the reaction is exothermic?
For the reaction: CaCO3(s) ⇌ CaO(s) + CO2(g), what will be the effect of increasing the pressure?
For the reaction: CO(g) + 2H2(g) ⇌ CH3OH(g), what will be the effect of increasing the pressure?
For the reaction: H2(g) + Cl2(g) ⇌ 2HCl(g), what will be the effect of increasing the concentration of HCl?
For the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what will happen to the equilibrium position if the pressure is decreased?
For the reaction: PCl5(g) ⇌ PCl3(g) + Cl2(g), what will be the effect of removing Cl2 from the system?
In an endothermic reaction at equilibrium, what is the effect of decreasing the temperature?
In an exothermic reaction, what is the effect of increasing temperature on the equilibrium constant (Keq)?
