Types of catalyst

Question 1

What are the two types of catalyst?

Answer 1

Homogeneous
Heterogeneous

Question 2

What are homogeneous catalysts?

Answer 2

In the same state (phase) as the reactants

Question 3

What do homogeneous catalysts form?

Answer 3

An intermediate with the reactants

Question 4

What happens to the intermediate formed by the homogeneous catalyst?

Answer 4

Breaks down to give the product
Regenerates the catalyst

Question 5

What are heterogeneous catalysts?

Answer 5

The catalyst is in a different phase from the reactants

Question 6

What is an example of a homogeneous catalysis?

Answer 6

depletion of ozone

Question 7

Write the equation for the depletion of ozone

Answer 7

2O3 (g) (Cl. catalyst) ⇌ 3O2 (g)

Question 8

Explain how the depletion of ozone is a homogeneous catalysis?

Answer 8

Chlorine radical (Cl) and ozone are in the same (gas) phase
Cl reacts with ozone to make an intermediate ClO which then is reformed afterwards

Question 9

What is an example of a heterogeneous catalysis?

Answer 9

Haber process

Question 10

Write the equation down for the harbour process

Answer 10

N2 (g) + 3H2 (g) ( Fe (s) catalyst) ⇌ 2NH3 (g)

Question 11

Explain how the harbour process is a heterogeneous catalysis

Answer 11

Iron catalyst is in a different phase (solid) to nitrogen and hydrogen