osmotic pressure

[datdat]

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i'm a bit confused...

let's say water flows from A---|-->B
then B is hypertonic to A right? what about osmotic pressure? is it A or B where the osmotic pressure is bigger?

also when we say, osmotic pressure in A..is the pressure exerts on the wall? like A -->| B or what?

 

[dds j]

Yes B would be hypertonic, but analyzing it in the perspective of the solute. When you are talking about osmotic pressure you are really looking at the diffusion of water. So A would have a higher concentration of water that diffuses to a lower concentration of water. As water moves from A to B, the pressure decreases in A and increases in B as water travels into the new section. Hope that Helps!

 

[solstice]

i'm a bit confused...

let's say water flows from A---|-->B
then B is hypertonic to A right? what about osmotic pressure? is it A or B where the osmotic pressure is bigger? Yes B is hypertonic to A. Osmotic pressure will be higher in A and water will go into B.

also when we say, osmotic pressure in A..is the pressure exerts on the wall? like A -->| B or what?

Osmotic pressure is just a special name for difference in pressure between two area when WATER is involved. Due to entropy nature wants make both sides equaly dilute. Since the solute can not pass through the barrier to equalize the concentrations, then liquid begins to move to the solution side. Evantualy the balance between force of entropy and pressure is achieved. This extra pressure on the solution side is called Osmotic pressure.