Rates Of Reaction

Question 1

Surface area

Answer 1

The greater the surface area, the faster the rate of reaction. There are more sites for collision

Question 2

What does the rate of reaction depend on?

Answer 2

The FREQUENCY of the collisions between particles

The ENERGY with which the particles collide

Question 3

Temperature

Answer 3

Increasing temperature means:
•particles have more KE so move around faster and collide more frequently
•a greater proportion of particles have enough energy to overcome the Ea so more collisions are successful

Question 4

Activation energy

Answer 4

The minimum amount of energy needed for particles to react. It is different for each reaction.

Question 5

Catalyst

Answer 5

Something that speeds up a reaction without being used up in the process

Question 6

Concentration definition

Answer 6

The number of particles in a given formula

Question 7

Concentration (rates)

Answer 7

The more concentrated a solution is, the more particles there are so there are more frequent collisions