Rates of Reaction

Question 1

List factors that affect the rate of a reaction

Answer 1

Temperature, Concentration (pressure), Surface Area, Catalyst

Question 2

How does increasing the temperature increase the rate of reaction

Answer 2

If you increase the temperature, you increase the particles’ kinetic energy, meaning they will move faster and collide more. Meaning there will be more successful collisions

Question 3

How does increasing concentration (pressure) increase the rate of reaction

Answer 3

By increasing the concentration that means the number of particles in the same volume has increased. Increasing the likelihood of successful collisions. In a gas, increasing the pressure means that the particles are more crowded. This means the frequency of collisions will increase, meaning the rate of reaction increases

Question 4

How does increasing the surface area increase the rate of reaction

Answer 4

If one reactant is a solid, breaking it into smaller pieces will increase its surface area to volume ratio. The particles around it will have more area to work on, so the frequency of collisions will increase. This means that the rate of reaction is faster for solids with a larger surface area to volume ratio

Question 5

What is the definition of a catalyst

Answer 5

A catalyst increases the rate of reaction without being used up

Question 6

How does using a catalyst increase the rate of reaction

Answer 6

A