Rates of Reactions- Unit 6

Question 1

Why does the rate of reaction increase

with increase temperature?

Answer 1

1 Higher temperature
2 Particles move more
3 More likely to collide
4 More successful collisions

Question 2

Why does the rate of reaction increase with increase

concentration?

Answer 2

1 More particles
2 in the same space
3 Particles more likely to collide
4 More successful collision

Question 3

What do particles need to react?

Answer 3

1 To collide

2 with energy higher than the activation energy

Question 4

How does a catalyst increase the rate of a

reaction?

Answer 4

1 Lowers the activation
2 Energy for a reaction
3 More particles with enough
4 Energy to react

Question 5

What is the activation energy for a reaction?

Answer 5

1 The minimum amount of energy need

2 for a reaction to occur

Question 6

Why does the rate of a reaction increase with surface area?

Answer 6

1 More exposed surface
2 for reactant to collide
3 more successful collisions

Question 7

How can you measure a rate of reaction?

Answer 7

1 Amount of gas given off using a gas syringe
2 Temperature change using a thermometer
3 Time taken to react using a stop watch
4 Change in pH using a pH meter

Question 8

Why does the rate of reaction increase with increases pressure?

Answer 8

1 Gas particles in a smaller space
2 More likely to collide
3 With more energy than the activation energy
4 so more successful collisions