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Equilibrium

Terms in this set (38)

As the rate of reaction is dependant on the concentration of the reactions, what is the forward reaction like?
starts off fast but slows as the reactants get less concentrated
When has a reaction reached equilibrium?
backward and forward reaction are equal and opposite if the temperature remains constant
What type of process is a reversible reaction?
dynamic process
What must happen for a reaction to reach equilibrium?
- both the reactants and products are present at all times
- the equilibrium can be approached from either side
- the reaction is dynamic - it is moving forwards and backwards
- the concentration of reactants and products remain constant
What is Le Chatelier's principle?
when a change is applied to a system in dynamic equilibrium, the system reacts in such a way as to oppose the effect of the change
What are the factors that affect the position of equilibrium?
- concentration
- pressure
- temperature
What happens if you increase the concentration of a reactant?
equilibrium shifts to the right
What happens if you increase the concentration of a product?
equilibrium shifts to the left
What happens if you decrease the concentration of a reactant?
equilibrium shifts to the left
What happens if you decrease the concentration of a product?
equilibrium shifts to the right
What will happen if you increase the concentration of O2 in this reaction?
2SO2 (g) + O2 (g) <=> 2SO3 (g)
equilibrium shifts to the right
Predict the effect of decreasing the concentration of SO3 on the equilibrium position.
2SO2 (g) + O2 (g) <=> 2SO3 (g)
equilibrium shifts to the right
What do you look at when there is a change in pressure?
the number of gaseous molecules on each side
What happens if you increase the pressure?
equilibrium shifts to the side with fewer gaseous molecules
What happens if you decrease the pressure?
equilibrium shifts to the side with more gaseous molecules
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