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Michael Noto
If I were asked to calculate the vapor pressure, and I calculated the osmotic pressure and converted it to mmHg, Would I get the right answer?
Michael Noto said:If I were asked to calculate the vapor pressure, and I calculated the osmotic pressure and converted it to mmHg, Would I get the right answer?
Basically I was given some data about a solution and was asked to find the Vapor Pressure in mmHG. After calculating the Molarity, I had all of the pieces to solve for PI=iMRT so I did that then converted the answer in ATM to mmHG.Borek said:Not like these things are completely unrelated, but in general no, these are separate phenomena.
Can you elaborate on why you think what you did is correct?
Osmotic pressure is the pressure required to prevent the movement of solvent molecules across a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.
Vapor pressure is the pressure exerted by the gaseous phase of a substance in equilibrium with its liquid or solid phase at a given temperature.
Osmotic pressure and vapor pressure are both colligative properties, meaning they depend on the concentration of solutes rather than the specific type of solute. As the concentration of solutes increases, both osmotic pressure and vapor pressure increase.
The main difference between osmotic pressure and vapor pressure is that osmotic pressure is a property of solutions, while vapor pressure is a property of pure substances. Osmotic pressure depends on the concentration of solutes, while vapor pressure depends on the temperature and intermolecular forces of the substance.
Osmotic pressure is typically measured using an osmometer, which measures the pressure required to stop the flow of solvent across a semipermeable membrane. Vapor pressure is measured using a variety of techniques, including the boiling point elevation method and the Knudsen effusion method.