C2.4 Rates of reaction

Question 1

What are the two equations used to work out the rate of reaction?

Answer 1

1) Amount of reactant used/Time

2) Amount of product formed/Time

Question 2

When is the only instance that chemical reactions can occur?

Answer 2

When reacting particles collide with each other (and with sufficient energy)

Question 3

What four things can you increase to increase the rate of reaction?

Answer 3

• Temperature
• Pressure
• Concentration
• Surface area

Question 4

How does increasing the four factors increase the rate of reaction?

Answer 4

• Temp= increases speed of particles

- All four= more frequent collisions

Question 5

The surface area of which reactants is increased?

Answer 5

Solid reactants

Question 6

The pressure of which reactants is increased?

Answer 6

Reacting gases

Question 7

The concentration of which reactants is increased?

Answer 7

Reactants in solution

Question 8

Why are catalysts important in industrial processes?

Answer 8

They’re important in increasing the rates of chemical reactions TO REDUCE COSTS

Question 9

Give up to three disadvantages of using catalysts in industrial processes

Answer 9

• Must be removed from product afterwards
• Expensive to buy
• Have to buy different ones for different reactions