Reaction rates

Question 1

What is the definition of a rate of a reaction?

Answer 1

The change in concentration of reactant or product per unit of time

Question 2

What are the standard units of rate?

Answer 2

moldm-3s-1
gs-1
cm3s-1

Question 3

What are the factors that affect the rate of a chemical reaction?

Answer 3

Temperature
Concentration of a solution
Pressure of a gas
Surface area of a solid
Addition of a catalyst

Question 4

What does the collision theory state?

Answer 4

For a chemical reaction to occur, particles must collide in the correct orientation, with sufficient energy (activation energy)

Question 5

How does a higher concentration affect the rate of reaction?

Answer 5

More reactant particles in a given volume
More frequent and successful collisions per unit time
Rate of reaction increases

Question 6

How does a higher pressure and lower volume affect the rate of reaction?

Answer 6

Number of molecules remain the same
Less space occupied
More frequent and successful collisions per unit time
Increase in rate of reaction

Question 7

How else can the pressure of gas be increases?

Answer 7

Having more molecules/particles in the same space