Factors affecting diffusion - SB8

Question 1

what is the definition of concentration?

Answer 1

the amount of substance in a certain volume of substance

Question 2

what is the equation for concentration?

Answer 2

mass of solute / mass of solution

Question 3

how many cm3 is a dm3?

Answer 3

1000cm3

Question 4

what is the concentration gradient?

Answer 4

difference between 2 concentrations

Question 5

how would the relationship between rate of diffusion and concentration difference be described? why?

Answer 5

directly proportional - the steeper the concentration gradient, the faster the rate of diffusion

Question 6

how can the relationship between rate of diffusion and surface area be described, why?

Answer 6

directly proportional - is the surface of a membrane is increased, there is more space through which a particle can pass

Question 7

how can the relationship between rate of diffusion and thickness of membrane be described, why?

Answer 7

inversely proportional - the thickness of a membrane decreases the rate of diffusion

Question 8

what does fick’s law show?

Answer 8

the relationship between the variables that afffect diffusion

Question 9

what equation represents fick’s law?

Answer 9

rate of diffusion ∝ (surface area x concentration difference)/ thickness of membrane