10.4 Dynamic Equilibrium and le Chatelier's principle

Question 1

Reversible Reactions

Answer 1

• Chemical reactions where the reaction can go in the forward and backward reaction (either direction)

Question 2

Dynamic Equilibrium

Answer 2

• The rate of the forward reaction is equal to the rate of the reverse reaction
• The concentrations of reactant and products do not change

Question 3

Features of an equilibrium system

Answer 3

Dynamic

Question 4

Le Chatelier’s Principle

Answer 4

When a system in equilibrium is subjected to an external change the system readjusts itself to minimise the effect of that change

Question 5

What does the position of equilibrium indicate?

Answer 5

• The extent of the reaction
• If the temperature, pressure or concentrations change, the position of equilibrium will change

Question 6

Kc

Answer 6

Equilibrium constant = [products]/[reactants]
‘c’ = equilibrium is constant in relation to constant

Question 7

Meaning of Kc

Answer 7

• If Kc is large, then the reaction is going more in the forward direction
• If Kc is small, then the reaction is going in the backward direction

Question 8

Reaction quotient

Answer 8

The concentration of the substances when the