5.6.1.2 Factors Which Affect the Rates of Chemical Reactions

Question 1

What are the factors which affect the rates of chemical reactions?

Answer 1

• concentration of reactants in solutions
• pressure of reacting gases
• surface area of solid reactants
• temperature
• catalysts

Question 2

What happens if you change the concentration of reactants in a solution?

Answer 2

• increase: rate of reaction increases
• decrease: rate of reaction decreases

Question 3

What happens if you change the pressure of reacting gases?

Answer 3

• increase: rate of reaction increases
• decrease: rate of reaction decreases

Question 4

What happens if you change the surface area of solid reactants?

Answer 4

• increase: rate of reaction increases
• decreases: rate of reaction decreases

Question 5

What happens if you change the temperature?

Answer 5

• increase: rate of reaction increases
• decreases: rate of reaction decreases

Question 6

What happens if you add a catalyst?

Answer 6

• rate of reaction increases