7.1 Rates of reaction

Question 1

Give the equation for rate of reaction

Answer 1

Amount of product formed

Time

Question 2

How can rates of reaction be measured?

Answer 2

.Amount of product used

.Amount of product formed

Question 3

Give two ways the quantity of a reactant can be measured

Answer 3

.Mass in grams

.Volume in cm3

Question 4

What are the two units for rate of reaction

Answer 4

.g/s

.cm3/s

Question 5

How can you measure the reactant used if its a gas?

Answer 5

.Carry out the reaction on a set of weighing scales and measure how much mass is lost

Question 6

How would you measure the product formed if the product is a gas?

Answer 6

.Measure the volume of gas produced in a gas syringe

Question 7

The minimum amount of energy required for a reaction is known as the…?

Answer 7

Activation energy

Question 8

What do you need to do in order to increase the rate of reaction

Answer 8

.Increase the frequency/energy of the collisions so that more of them reach the activation energy

Question 9

Give three ways you could increase the rate of reaction

Answer 9

.Increasing temperature
.Increasing pressure
.Increasing concentration
.Increasing surface area
.Use a catalyst

Question 10

How does increasing the temperature increase the rate of reaction?

Answer 10

.It increases the kinetic energy of particles so they collide more frequently and energetically

Question 11

How does increasing pressure increase the rate of reaction>

Answer 11

.Increases the number of particles in a given volume so there are more collisions

Question 12

How does increasing the concentration increase the rate of reaction?

Answer 12

.Increases the number of particles in a given volume, so increases the number of collisions

Question 13

How can increasing the surface area of solid reactants increase the rate of reaction?

Answer 13

.Increases frequency of collisions increasing the rate of reaction

Question 14

What are Catalysts?

Answer 14

.Substances that speed up chemical reactions without being changed or used up

Question 15

What happens to the mass of a catalyst during a reaction?

Answer 15

It stays the same

Question 16

What is the enzyme used in the production of alcoholic drinks?

Answer 16

Yeast

Question 17

What is fermented from sugars in the production of Ethanol?

Answer 17

Yeast