Rates of Reaction

Question 1

The rate of a reaction is the ______ a reaction happens.

Answer 1

Speed

Question 2

What do particles have to do in order to react?

Answer 2

Collide

Question 3

The minimum energy required for a successful collision is called the _________ energy

Answer 3

Activation

Question 4

Why does increasing the concentration increase the rate of reaction?

Answer 4

There are more particles in a given volume so there are more frequent collisions.

Question 5

Does a 10g lump of solid have a bigger or smaller surface area than 10g of powdered solid?

Answer 5

Smaller

Question 6

Why does increasing the temperature increase the rate of reaction?

Answer 6

The particles have more energy so there are more frequent and harder collisions.

Question 7

What does a catalyst do?

Answer 7

Increases the rate of reaction without being used up

Question 8

When investigating the effect of surface area on the rate of reaction, what are the control variables?

Answer 8

The mass of the solid used, the volume and concentration of the liquid used.

Question 9

Describe how the volume of gas given out in a reaction changes with time.

Answer 9

Increases quickly at first then slows down and stops.

Question 10

How do you calculate the rate of reaction

Answer 10

Measure the change in the amount of a reactant or product in a certain time.