C8

Question 1

How to measure rate of reaction

Answer 1

Amount of reactant used / time
Or
Amount of product formed / time

Question 2

Units of rate of reaction

Answer 2

G/s or cm3/s or in mol/s

Question 3

How to find rate of reaction graphically

Answer 3

Draw a tangent and use the tangent to calculate the grandient which is the rate of reaction at a specific time

Question 4

Factors that affect the rates of chemical reactions

Answer 4

Concentration
Pressure
Surface area
Temperature
Catalysts

Question 5

What is the collision theory

Answer 5

The theory that chemical reactions can only occur when reacting particles collide with eachother and with sufficient energy

Question 6

What is activation energy

Answer 6

The minium amount of energy that particles must have to react

Question 7

What factors increase the frequency of collosions

Answer 7

Increasing the concentration of reactants in solution, the pressure of reacting gases and the surface area of solid reactants

Question 8

What does increasing the frequency of collisions mean

Answer 8

The increase in the rate of reaction

Question 9

What is a catalyst

Answer 9

Substances that speed up the rate of chemical reactions without being changed or used up during the reaction