Rate of diffusion

Question 1

factors affecting rate of diffusion

Answer 1

temperature (increase)
concentration gradient (steep)
surface area to volume ratio (large)
diffusion pathway (short

Question 2

increasing the temperature

Answer 2

this increases the kinetic energy of the particles so they move more quickly

Question 3

increasing the surface area to volume ratio

Answer 3

there is more surface available for particles to move across therefore can get from one side to the other faster

Question 4

concentration gradient

Answer 4

substances diffuse faster if there is a big difference in the concentration

Question 5

pathway of diffusion

Answer 5

substances diffuse more quickly when they haven’t as far to move

Question 6

how to calculate the surface area to volume ratio of a cube

Answer 6

(length x breadth x height)
multiply answer by six to work out the whole surface area
calculate the volume (length x breadth x height)
compare them in a ratio (Surface Area:Volume)