5.6 Equilibria
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What does it mean when a reaction is reversible?
can go backwards as well as forwards
Give examples of a reversible reaction
dehydration of copper sulphate decomposition of ammonium chloride
What does dynamic equilibrium mean?
forwards and backwards reactions happening at same rate while concentrations of reactants and products remain unchanged
What is Le Chatelier’s principle?
equilibrium shifts to counteract any change imposed on it
What variables cause equilibrium shifts?
amounts of reactants or products gas pressure temperature
What equilibrium shift does adding a substance cause?
whichever direction is used up
What equilibrium shift does removing a substance cause?
whichever direction creates it
What equilibrium shift does increasing gas pressure cause?
fewest moles of gas
What equilibrium shift does decreasing gas pressure cause?
most moles of gas
What equilibrium shift does increasing temperature cause?
whichever direction is endothermic
What equilibrium shift does decreasing temperature cause?
whichever direction is exothermic