Ah, thank you! That was exactly the kind of explanation I was looking for. I see what you mean by multiple approaches now. Thank you for your patience throughout this adventure haha. Just to check my understanding, let's say there was a 3rd situation, in which the two solutions are in a beaker...
Yea sorry, I don't have an exact context to put this in. It's just part of the basic science/physiology review for medical school - osmotic pressure and solute transport. I don't see why we need different approaches though - shouldn't there be one conceptual explanation of what describes water...
Uh. Not really? The only difference I can think of is that KCl dissociates but since the units are Osm, wouldn't that be irrelevant. From what I'm getting, you're saying the movement of water is going to be driven solely by the total solute concentrations. Thus, though the urea concentrations...
Hmm... so in the final equilibrium, will total solute concentrations be equivalent on both sides, but urea concentrations will not be equivalent? (Since the two cases are incompatible).
Hey thanks for the reply, but I'm still wondering if my analysis of the driving forces for equilibrium are correct. I.e. is there going to be urea solute diffusion activity that pushes the equilibrium in addition to the water activity, so the final equilibrium will be a balance between these two...
Hi all,
This is the situation: Solution A with 200 Osm urea, solution B with 200 Osm KCl, separated by a semipermeable membrane that is permeable to urea but impermeable to KCl. Each solution is in 1 L water. Calculate the equilibrium concentrations of urea and KCl.
The numerical answer...