T8 YR11 - Rates of reaction

Question 1

How do you calculate rate?

Answer 1

Something per unit / time

Question 2

How can you see the rate of reaction in 2 ways?

Answer 2

Dissapearance of reactant
Appearance of product

Question 3

What is one method to measure the appearance of a product?

Answer 3

Gas syringe to measure the hydrogen escaping

Question 4

What is the collision theory?

Answer 4

To increase surface area
Exposes more particles to other reactant
Increases frequency of collisions
Increases successful amount of collisions
Increases rate of reaction
NEEDS ACTIVATION ENERGY

Question 5

What is another way of increasing amount of successful collision?

Answer 5

Temperate increase

Question 6

How does a higher concentration affect the rate of reaction?

Answer 6

More particles are available to collide with each other meaning more successful collision and a increases rate of reaction

Question 7

What does the effect of pressure have on the rate of reaction?

Answer 7

Increased pressure pushes particles closer together meaning more dense and more collisions

Question 8

Are transition metals good catalysts?

Answer 8

Yes

Question 9

What forms can transition metals come in to increase surface area?

Answer 9

Powder, pellets and fine gauze

Question 10

Do catalysts have anything to do with collisions?

Answer 10

No

Question 11

Why are catalysts not linked with amount of collisions?

Answer 11

Provide an alternative reaction pathway with a lower activation energy