Reaction Rates and Equilibrium

Question 1

What is meant by rate of reaction?

Answer 1

How fast a reactant is being used up or how fast a product is formed

Question 2

What four factors can change the rate of a chemical reaction?

Answer 2

Concentration
Temperature
Catalyst
Surface area

Question 3

What is needed for a successful collision?

Answer 3

The particles to collide with the correct orientation

The. Particles to have sufficient energy to overcome the activation energy barrier of the reaction

Question 4

How does increasing the concentration affect the rate of reaction?

Answer 4

Increases the number of particles in the same volume so they are closer together and collide more frequently

Question 5

What are the methods for following the progress of a reaction?

Answer 5

Monitoring the removal of a reactant

Following the formation of a product

Question 6

How would you measure the progress of a reaction that produces gas?

Answer 6

Monitor volume of gas produced at regular time intervals

Monitor loss of reactants using a balance

Question 7

What does a catalyst do?

Answer 7

Not used up by chemical reaction
May react with a reactant to form an intermediate or may be surface for reaction to happen on
At end of reaction catalyst is regenerated

Question 8

What is a homogeneous catalyst?

Answer 8

Has the same physical state as the reactants

Question 9

What is a heterogeneous catalyst?

Answer 9

Has a different physical state to the reactants

Question 10

What are three features of a Boltzmann distribution?

Answer 10

Curve starts at origin
Area under curve is equal to the total number of molecules
The curve does not meet the x axis at high energy cause there is no maximum energy for a molecule