Chemistry: Rates of Reactions part 2

?
  • Created by: daniella
  • Created on: 19-05-13 15:30
What increases the rate of reaction: higher or lower concentration?
Higher
1 of 15
Why?
-There are more reactant particles in the same volume -There is a greater chance of the particles colliding -The rate of reaction increases
2 of 15
What increases the rate of reaction: higher or lower pressure of reacting gasses?
Higher
3 of 15
Why?
-There are more reactant particles in the same volume -There is a greater chance of the particles colliding -The rate of reaction increases
4 of 15
What increases the rate of reaction: higher or lower temperature?
Higher
5 of 15
Why?
-The reactant particles move more quickly -More particles have the activation energy or greater -The particles collide more often, and more of the collisions result in a reaction -The rate of reaction increases
6 of 15
What increases the rate of reaction: higher or lower particle size?
Higher
7 of 15
Why?
-Its surface area is increased -More particles are exposed to the other reactant -There is a greater chance of the particles colliding -The rate of reaction increases
8 of 15
What happens to the catalyst during a chemical reaction?
It is unchanged and can be filtered
9 of 15
What does a catalyst do?
It increases the rate of a reaction
10 of 15
How?
It lowers the activation energy needed. More collisions result in a reaction, so the rate of reaction increases.
11 of 15
Do all reaction require the same catalyst?
No, different reactions need different catalysts.
12 of 15
Give an example of where a catalyst is used
Test with: Hydrogen peroxide and manganese dioxide
13 of 15
What happens in this?
The catalyst (manganese dioxide) makes the hydrogen peroxide decompose into water and oxygen
14 of 15
What can happen if a reaction occurs quickly?
It can boil
15 of 15

Other cards in this set

Card 2

Front

Why?

Back

-There are more reactant particles in the same volume -There is a greater chance of the particles colliding -The rate of reaction increases

Card 3

Front

What increases the rate of reaction: higher or lower pressure of reacting gasses?

Back

Preview of the front of card 3

Card 4

Front

Why?

Back

Preview of the front of card 4

Card 5

Front

What increases the rate of reaction: higher or lower temperature?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Rate of reaction resources »