May 28, 2024, 03:41:57 PM
Forum Rules: Read This Before Posting

### Topic: osmosis  (Read 4908 times)

0 Members and 1 Guest are viewing this topic.

#### Wil"

• Regular Member
• Posts: 40
• Mole Snacks: +0/-3
##### osmosis
« on: March 08, 2008, 11:05:17 PM »
I would like to clarify my understanding in osmosis....
Osmosis refers to the transport of solvent from a dilute solution to a concentrated solution through a semi-permeable membrane.

Consider the following situation.
1) There is 1M of solution A made up by 3dm3 of solvent, and there is a 2M of solution B made up by 1dm3 of solvent.
So which direction will the solvent flow?? from A to B or vice versa??

2)If now solution A and B are in same concentration, but A is dissolved in 3dm3 of solvent and B is dissolved in 4dm3 of solvent, what'll be the direction of the solvent flow?

So in osmosis...it's the concentration of the solution or the amount of the solvent determines the direction of the flow of the solvent??

#### ARGOS++

• Sr. Member
• Posts: 1489
• Mole Snacks: +199/-56
• Gender:
##### Re: osmosis
« Reply #1 on: March 08, 2008, 11:17:37 PM »

Dear Will”;

Every” Solution trends to get as diluted as possible.

Maybe it can be of help with some add. Links on:    "Osmotic Pressure

Good Luck!
ARGOS++

#### Arkcon

• Retired Staff
• Sr. Member
• Posts: 7367
• Mole Snacks: +533/-147
##### Re: osmosis
« Reply #2 on: March 08, 2008, 11:37:41 PM »
My college biophysics professor explained it to us this way.  You have a large glass container, with an air proof seal.  Sealed inside are two open beakers, one with 100 ml of a 1 M solution of NaCl and another with 100 ml of a 2 M solution.  What happens over time, as water evaporates and condenses?  Eventually, he gradually coxed the conclusion out of us, that the two vessels would reach an equilibrium with the same conc. of NaCl, and by extension, less water in the first and more water in the second.  The semi-permeable membrane just allows them to be in contact while that happens.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

#### Borek

• Mr. pH
• Deity Member
• Posts: 27688
• Mole Snacks: +1803/-410
• Gender:
• I am known to be occasionally wrong.
##### Re: osmosis
« Reply #3 on: March 09, 2008, 05:25:20 AM »
In short - osmosis works to make osmotic pressure on both sides identical.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

#### ARGOS++

• Sr. Member
• Posts: 1489
• Mole Snacks: +199/-56
• Gender:
##### Re: osmosis
« Reply #4 on: March 09, 2008, 03:49:00 PM »

Dear  Mr. Borek;

Can this not be even more shorted, as in real live?:
Who makes most pressure – gets most!

Good Luck!
ARGOS++