Collision Theory and reaction rate

Question 1

What are Chemical reactions?

Answer 1

Chemical reactions involve breaking bonds in the reactants and forming new bonds in the products

Question 2

What are the 3 rules that collision theory must follow?

Answer 2

1. Particles must collide
2. The collision must have enough energy to break old bonds and form new bonds
3. Particles must collide in the correct orientation for particles to rearrange and make new compounds

Question 3

What is collision theory?

Answer 3

Collison theory is when substances are mixed and a chemical reaction sometimes occurs when the particles collide

Note : Not every collision results in a reaction

Question 4

What is reaction rate

Answer 4

Reaction rate is how fast a chemical reaction occurs

Question 5

What is an example of a fast reaction rate

Answer 5

Firework exploding

Question 6

What is an example of a slow reaction rate

Answer 6

Rusting

Question 7

What are the five main factors that effect rate of reaction

Answer 7

Surface area
Temperature of reactants
Concentration of reactants
Action of a catalyst
Nature of reactants

Question 8

Surface area of reactants

Answer 8

Higher surface area = Greater number of collisons

More collisions = Faster reaction rate

Question 9

Temperature of reactants

Answer 9

Increases kinetic energy = faster particle movement

Faster particle movement = more collisions

More collisions = Faster reaction rate

Question 10

Concentration of reactants

Answer 10

Higher concentration = Higher amount of particles

Higher amount of particles = greater likelyhood of collisions

More collisions = Faster reaction rate

Question 11

Action of catalyst

Answer 11

A substance that increases the reaction rate but is not consumed in the reactions

A catalyst provides the reactants with an alternative pathway that needs less energy