1.6 Equilibria & Kc

Question 1

How is dynamic equilibrium reached

Answer 1

• at start forward reaction is fast and backwards reaction is slow
• after start, forward reaction slows down and reverse reaction speeds up
• rate of forward reaction becomes same as rate of backward reaction

Question 2

State Le Chatelier’s principle

Answer 2

If a change is made to a system in dynamic equilibrium, position of the equilibrium moves to counteract this change

Question 3

What system can dynamic equilibrium occur

Answer 3

Can only occur in systems, where no substances can get in or out to affect the reaction

Question 4

What happens to equilibriums if concentration of reactants increases

Answer 4

Equilibrium will shift to products, so yield of products increases

Question 5

What happens to equilibrium if you increase pressure

Answer 5

Equilibrium shifts to the side with fewer moles

Question 6

What values affect the value of Kc and what doesn’t

Answer 6

Not affected by contention change but affected by change in temperature