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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