Rates of reaction

Question 1

Explain the effects of adding catalysts on rates of reaction?

Answer 1

it provides an alternate route
with a lower activation energy
so the proportion of collisions that are successful is higher
so there are more successful collisions per unit time

Question 2

explain how a higher temperature affects rates of reaction?

Answer 2

the particle have more kinetic energy
so the proportion of collisions that are successful are higher
so there are more successful collisions per unit time

Question 3

explain how surface area affects rates of reaction?

Answer 3

more of the solid is accessible
so there are more collisions per unit time
and therefore more successful collisions per unit time

Question 4

explain how increasing the concentration affects rates of reaction?

Answer 4

more particles per unit volume
more collisions per unit time
more successful collisions per unit time