3.1.6 Equilibria

Question 1

what’s a dynamic equilibrium

Answer 1

both forward and backward reactions are occurring simultaneously

Question 2

what are the 2 features of dynamic equilibrium?

Answer 2

1. forward & backward reactions are occurring at equal rates
2. the concentrations of reactants and products stay constant

Question 3

what’s Le Chatelier’s principle?

Answer 3

if an external condition is changed the equilibrium will shift to oppose the change

Question 4

increasing temperature: effect on equilibria?

Answer 4

-the equilibrium will shift to oppose this and move in the endothermic direction to try and reduce temperature

Question 5

increasing pressure: effect on equilibria?

Answer 5

-equilibrium will shift to oppose this and will shift towards the side with fewer moles of gas and thereby reduce the pressure

Question 6

increasing concentration: effect on equilibria?

Answer 6

-equilibrium will shift to oppose this and move in the forward direction to decrease concentration

Question 7

catalyst: effect on equilibria?

Answer 7

-no effect, but will speed up rate at which equilibrium is achieved
-it doesn’t effect position of equilibrium because it speeds up the rates of the forward and backward reactions by the same amount

Question 8

equation for equilibrium constant?

Answer 8

(Products chemical formula to power of number in front) / (reactants chemical formula to power of number in front)