OCR A2 Chemistry Le Chatelier's Principle

Sarah H-V
Mind Map by Sarah H-V, updated more than 1 year ago
Sarah H-V
Created by Sarah H-V over 5 years ago
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A Levels Chemistry Mind Map on OCR A2 Chemistry Le Chatelier's Principle, created by Sarah H-V on 01/29/2015.

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OCR A2 Chemistry Le Chatelier's Principle
1 Dynamic Equilibrium
1.1 The equilibrium which exists in a closed system when the rate of the forward reaction is equal to the rate of the reverse reaction
1.2 A chemical system is in dynamic equilibrium when:
1.2.1 The concentrations of the reactants and the products remain the same
1.2.2 The rate of the forward reaction is equal to that of the reverse reaction
2 The effect of pressure on equilibrium
2.1 Changing the pressure only changes the position of equilibrium if there are gases present
2.2 Increasing the pressure will shift the position of equilibrium to the side with the fewer gas molecules
2.3 Decreasing the pressure will shift the position of the equilibrium to the side with a greater number of gas molecules
3 The effect of temperature on equilibrium
3.1 Increasing the temperature shifts the position of the equilibrium in the endothermic direction in order to minimise the temperature increase and absorb energy
3.2 Decreasing the temperature shifts the position of the equilibrium in the exothermic direction in order to minimise the temperature decrease and replace heat energy
4 Le Chatelier's principle states:
4.1 When a system in dynamic equilibrium is subjected to change the position of the equilibrium will shift to minimise the change
5 The effect of concentration on equilibrium
5.1
5.2
5.3
6 The effect of a catalyst on equilibrium
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