La Chateleirs Principle - Rules Summary

Question 1

what happens to the equilibrium if the concentration of a reactant is increased

Answer 1

its position will shift to the right and the Kc value will remain unchanged

Question 2

what happens to the equilibrium if the concentration of a reactant is decreased

Answer 2

its position will shift to the left and the Kc value will remain unchanged

Question 3

what happens to the equilibrium if the forward reaction is endothermic and an increase in temperature occurs

Answer 3

the product yeild and Kc will increase

Question 4

what happens to the equilibrium if the forward reaction is endothermic and a decrease in temperature occurs

Answer 4

product yeild and Kc decrease

Question 5

what happens to the equilibrium if the forward reaction is exothermic and a decrease in temperature occurs

Answer 5

product yeild and Kc will increase

Question 6

what happens to the equilibrium if the forward reaction is exothermic and an increase in temperature occurs

Answer 6

product yeild and Kc will decrease

Question 7

what happens when the pressure of an equilibrium is increased

Answer 7

the reaction shifts to the side of the equilibrium with the least number of gas molecules and Kc remains unchanged

Question 8

what happens when the pressure of an equilibrium is decreased

Answer 8

the reaction shifts to the side of the equilibrium with more gas molecules and Kc remains unchanged

Question 9

what does a catalyst do to an equilibrium

Answer 9

it does not affect the equilibrium position of a reaction, only how quickly the equilibrium is reached

Question 10

when does the pressure/gas rule for equilibriums apply

Answer 10

in reactions with one or more gaseous reactants or products present