C8.4 The effect of concentration and pressure

Question 1

How does increasing the concentration affect the rate of reaction?

Answer 1

There are more particles in a fixed volume
This increases frequency of successful collisions
Therefore the rate of reaction increases

Question 2

How does increasing the pressure affect the rate of reaction

Answer 2

There are more particles in the fixed volume
This increase the the frequency of successful
collisions
Therefore the rate of reaction will increase

Question 3

How can you investigate the effect of changing concentration?

Answer 3

Reacting marble chips with different concentrations of HCL
You can find the rate of the reaction by plotting the volume of CO2 gas given off as the reaction progresses over a given time