Questions tagged [osmosis]
the spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.
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Does glycerin promote bacterial growth the same as water?
A sodium chloride + water solution draws the water out from bacteria through the process of osmosis.
Would a sodium chloride + glycerin solution have the same antibacterial effect?
If I understand ...
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How can semi-permeable membrane be so smart?
According to the definition, a semi-permeable membrane is a membrane that allows only solvent molecules to pass through it; solute molecules are blocked. Solvent molecules flow from the membrane side ...
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Does Reverse Osmosis remove elemental ions from water?
From what I understand, RO is able to remove (or at least considerably reduce) the salts dissolved in water.
But thinking about it just doesn't make sense. RO works by filtering the solution using a ...
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Osmotic Pressure
If the osmotic pressure of a 0.010 M aqueous solution of sucrose at 27˚C is 0.25 atmosphere, then the osmotic pressure of a 0.010 M aqueous solution of NaCl at 27˚C is
(a) 0.062 atm
(b) 0.12 atm
(c)...
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Can I equalise osmotic pressure using two different solutes?
I understand that there is a pressure gradient between an aqueous solution, e.g. salty water, and, say, pure water due to osmosis. My question is, is it possible to match or almost match, the osmotic ...
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Fundamental physical forces behind osmosis
I wonder which fundamental forces act behind osmosis process? Sum of these forces oppose gravity force, like in this figure:
So I wonder what are these forces?
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Highest osmotic pressure
I’d like to ask a question and clear my misunderstanding.
Which of the following 0.01 M solutions have the highest osmotic pressure?
-$\ce{NaCl}$
-$\ce{C12H22O11}$
-$\ce{BaCl2}$
-$\ce{CO(...
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Water softener and RO filter
I have a water softener for showers and dishwasher and a reverse osmosis filter for drinking water. For convenience of the install, the RO filter is using softened water (some calcium carbonate has ...
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Why is pickle salty? How does salt get into pickle?
I know this may look like some question easily answered with common sense, but please read.
If water is the solvent wouldn't the only thing that moves be water? (Osmosis)
Edit: this is basically ...
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Osmolarity and osmotic pressure
You have discovered a new strain of bacteria called Tankeromyces subtilis that has a special outer membrane that is capable of withstanding high levels of osmotic pressure. These bacteria can survive ...
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How to calculate the osmotic pressure of a sucrose solution?
The boiling point of an aqueous solution containing sucrose, $\ce{C12H22O11}$, is $101.45~^\circ\mathrm{C}$. Calculate the osmotic pressure of this solution at $35~^\circ\mathrm{C}$, at which the ...
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Converting mm Hg to mm H2O
So here's my problem:
What is the osmotic pressure, noted in mm of $\ce{H2O}$, of a solution with 125 micrograms of vitamin B12 ($\ce{C63H88CoN14O14P}$) in 2.50 mL of $\ce{H2O}$ at 25 degrees Celsius....
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How to create a simple do-it-yourself procedure to measure diffusion?
While I am not asking the question here, a recent question concerning osmosis at the Bio SE caught my interest. In a nutshell that question was, given isotonic solutions of sugar inside and outside an ...
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Why is dialysis tubing impermeable to sucrose?
This question was posed a couple years ago but not answered adequately. You can view the older thread here. The cellulose membrane commonly used in high school and university labs is widely available ...
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Use of osmosis to measure molecular weight of macromolecules
I found a question in a biochemistry book.
How can osmosis be used to measure molecular weight of macromolecules? Is it applied practically?
A general answer without the usage of many technical ...
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