Chemical Equilibria Flashcards
What is the definition of reversible
A reaction which goes in both forward and backwards directions
What is the definition of equilibrium
A reversible reaction in which the amount of each reactant/product remains constant
What is the definition of dynamic equilibrium
Rate of forward reaction is equal to the rate of backwards reaction
What are the three characteristics of the equilibrium star
Closed system
Both forward and backwards reactions
Dynamic
What are the two types of chemical equilibria
Homogeneous and heterogeneous
What is the definition of homogeneous equilibria
A reaction in which all the reactants and products are in the same physical state
What is the definition of heterogeneous equilibria
A reaction in which all the reactants and products are not in the same physical state
What is the equilibrium constant
Kc = [products]
—————
[reactants]
What does the number of moles in the equation represent in the equilibrium constant
The power
What does the equilibrium constant indicate and what is the only thing it depends on
Indicates how far the equilibrium is over to the rhs
Depends on temperature
What is Le Chatelier’s Principle
When a change is imposed on a system in equilibrium the system tends to adjust so as to minimise the change
What does the position of equilibrium mean
Proportion of reactants and products in the equilibrium system
What does a large Kc indicate
The position of equilibrium is to the rhs
What does a low Kc indicate
The position of equilibrium is to the lhs
How do you know when equilibrium has been achieved
Colour stays the same
