diffusion lab

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diffusion

random movement of molecules form high to low concentration

for diffusion to occur there must be

concentration gradient

passive process

no energy required

is diffusion passive or active

passive

barrier to diffusion

cell membrane

selectively permeable

allows passage of some but not others

factors that influence rate of diffusion

steepness of diffusion

molecular weight

temperature

molecules of slat and water are produced when

acids and bases react

dialysis

solutes diffuse across semipermiable membrane

osmosis

diffusion of water across selectively permeable membrane

iodine solution tests for

starch

benedicts solution tests for

reducing sugars

Benedict solution turns (if pos)

blue to yellow

iodine turns (if pos)

purple

silver nitrate turns (if pos)

white and cloudy

silver nitrate tests for

chlorine

relationship between temp and diffusion

directly proportion (increased heat = increased diffusion)

did glucose diffuse out of dialysis bag

yes

did iodide diffusion into bag

yes

did glucose diffuse out of dialysis bag

yes