Unit 1-Factors Affecting Rate

Question 0

Before any chemical relation can happen what two thins must happen?

Answer 0

• the particles must collide

- the colliding particles must have enough energy to react

Question 1

How are the rates if chemical reactions affected?

Name three

Answer 1

Changes in…

• concentration
• particle size
• temperature
• adding a catalyst

Question 2

What is activation energy?

Answer 2

The minimum energy that colliding particles require for a reaction to occur

Question 3

What two things that need to happen if the rate of reaction increases?

Answer 3

• increase the number of collisions

- give the colliding particles the required activation energy

Question 4

How do you increase the reaction rate of a solid?

Answer 4

Cut it onto smaller pieces so the particle size is smaller which means more particles and more collisions can take place

Question 5

What happens when you increase te concentration of the reactant?

Answer 5

There is an increase in number of particles so more collisions can take place

Question 6

What happens when you increase the temperature?

Answer 6

• the particles move faster and collide more

- more of the colliding particles have the required activation energy