Diffusion and osmosis

what is diffusion

high to low

movement of particles from an area of higher concentrations to lower concentrations 

what does diffusion do

equalizes the concentration throughout the medium

what is osmosis

movement of solvent particles

movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution

what does osmosis do

dilute to concentrated solution

solvent moves to dilute the concentrated solution and equalize the concentration on both sides of the membrane

what is a concentrated solution

the quantity f solute dissolved in a specific volume of solution 

what moves in diffusion

solute particles

what moves in osmosis

solvent particles

solutes can’t go through so water moves

diffusion characterisics

occurs in any mixture, including one that has a semipermeable membrane

both solvent and solute particles are free to move

osmosis characteristics

-always occurs across a semipermeable membrane

-refers to the movement of water

-only the solvent moves

-moves in response to thee solute concentration

example of diffusion

gas exchange in the lungs

example of osmosis

movement of water through body

hypertonic

has a higher solute concentration than other solution

hypotonic

has a lower solute concentration than other solution

isotonic

solutions have equal concentration