Rate of Reaction

Question 1

Name 5 factors that effect the rate of reaction.

Answer 1

1. Temperature
2. Concentration
3. Pressure of reacting gases
4. Surface area of reacting solids
5. Use of catalysts

Question 2

What are chemical reactions?

Answer 2

Reactant particles colliding with enough energy (activation energy). The more frequently the particles collide and the greater proportion of collisions with enough energy, the greater the rate of reaction.

Question 3

Name two ways of measuring rate of reaction.

Answer 3

1. Measure how fast the reactant is used up
2. Measure how fast the product is formed
   The method chosen depends on the reaction being studied

Question 4

Name the two things you can measure when measuring the rate of reaction.

Answer 4

1. The mass of a substance - solid, liquid or gas - measured on a balance
2. The volume of a gas - measured with a gas syringe.

Question 5

What is the formula for rate of reaction?

Answer 5

rate of reaction = amount of product formed or amount of reactant used / time taken

Question 6

Name 5 factors that increase the rate of reaction.

Answer 6

1. Increased temperature
2. Increased concentration of a dissolved reactant
3. The pressure of a reactant gas is increased
4. The reactant solid is broke into smaller pieces - increasing the surface area.
5. A catalyst is used