Equilibrium Constants

Question 1

What is dynamic equilibrium ?

Answer 1

The rate of the forward reaction is the same as the reverse/ backward reaction

Question 2

What factors affect the position of equilibrium?

Answer 2

Concentration
Temperature
Pressure

Question 3

Why doesn’t a catalyst affect the rate of equilibrium ?

Answer 3

It speeds up both the forward and backwards reaction by the same amount.
Equilibrium is only reached faster

Question 4

State Le Chatelier’s Principle

Answer 4

If a system at equilibrium is subjected to a change then the position of equilibrium will shift to minimise the change

Question 5

Wha can you tell about the reaction when assessing the position of equilibrium?

Answer 5

If the position of equilibrium is over to the LHS then this means there are more reactants than products
RHS = more products than reactants

Question 6

How is Kc Calculated?

Answer 6

[C]c [D]d
————-
[A]a [B]b

Question 7

What factors affect the value of Kc ?

Answer 7

Kc is temperature dependent. Only temp affects the value,it isn’t affected by change in pressure, concentration or a catalyst.

Question 8

How can you wok out the position of equilibrium from Kc?

Answer 8

If Kc &laquo_space;equilibrium lies to the left
Kc&raquo_space; 1 equilibrium lies to the right