diffusion and osmosis

Question 1

o2 and carbon dioxide:

Answer 1

02 diffuses in cell
carbon d diffuses out of cell

Question 2

define concentration and diffusion:

Answer 2

molecules packed together
molecules move from a high c to a low c until equilibrium- equally spread out#

Question 3

what does speed of diffusion depend on:

Answer 3

temp
speed
size of molecules
state of matter
distance
concentration gradient

Question 4

example of a diffusion practical:

Answer 4

ammonia and hydrogen chloride
ammonia has smaller particle so diffuses faster in the tube rather than hydrogen chloride which diffuses slower as it has larger molecules so this forms a white cloudy substance towards the right side where the hydrogen chloride is known as ammonium chloride.

Question 5

state of matters and diffusion:

Answer 5

solids-don’t as particles don’t freely move
liquids- diffuses slower
gases- diffuses faster

Question 6

osmosis-

Answer 6

movement of water from an area of hc to an area of lc across a partially permeable membrane-tiny holes allowing it to pass thru but not large molecules
eg. cell membrane in our body