2.10.1 Dynamic Equilibria

Question 1

When is an equilibrium dynamic?

Answer 1

It is a dynamic equilibrium when the products are still making the reactants and the reactants are making the products

Question 2

In a dynamic equilibrium, how can the concentrations of the products and reactants be compared?

Answer 2

The concentrations are constant, but not the same

Question 3

What does Le Chalelier’s principle say?

Answer 3

When the conditions of an equilibrium are changed, then the position of equilibrium will shift to minimise the change

Question 4

How does a change in the amount of chemicals affect the position of the equilibrium?

Answer 4

If a reactants is reduced or a product is increased, then the equilibrium will shift left to oppose the change

Question 5

What is the effect on the equilibrium from a change in concentration?

Answer 5

If a reactants concentration is reduced or a product concentration is increased, then the equilibrium will shift to the left to oppose the change

Question 6

What is the effect on the equilibrium from a change in pressure?

Answer 6

The equilibrium will shift to the side with the least mole. This is because more gas molecules produce more pressure, so the equilibrium tries to reduce the number of molecules.

Question 7

What is the effect on the equilibrium from a change in temperature?

Answer 7

When temperature is increased, the equilibrium will shift in the direction of the endothermic reaction, so to reduce the temperature.

Question 8

What effect does a catalyst have on an equilibrium?

Answer 8

Although catalysts increase the rate of the reaction, they don’t change the position of the equilibrium

Question 9

When is a reaction at equilibrium?

Answer 9

A reaction is at equilibrium when the concentration of the reactants and products are constant in a reversible reaction