Water Potential Flashcards
define osmolarity
total solute concentrations in a solution
define turgor pressure
cell wall expands until it exerts pressure on the cell
define water potential
measures the tendency of water to move by osmosis
moves from high w.p to low w.p
It can be negative, positive or 0
What happens if a water potential is negative?
the more likely water will move there
What does increasing # of solute of water do to the solute potential and water potential?
Increase in solute potential
decrease in water potential
What does increasing the water potential do to the pressure potential?
Increases it
What does a decreased pressure potential to do the water potential?
decreases it
What does the addition of solutes do to the solute potential
makes it more negative so water will flow there
What is the sucrose and NaCl ionization constant?
sucrose=1
NaCl- 2
What is the C in -iCRT?
moles
what is the R in iCRT?
the pressure constant
0.0831
what is another name for the solute potential?
Osmotic potential
whwn is the pressure potential 0?
open system
when is the pressure potential negative?
dead xylem cells
when is the pressure potential positive?
in living cells
