“The Osmotic pressure method has the advantage over other methods as pressure measurement is around room temperature and the molarity of the solution is used instead of molality. As compared to other colligative properties, its magnitude is large even for very dilute solutions.
People also ask, what is the advantage of using osmotic pressure as compared to other Colligative properties?
Osmotic pressure has advantages for finding out the molar mass over other collegative properties as pressure measurement is around room temperature and molarity is used instead of molality. Osmotic pressure can be determined at any (room)temperature,while others methods are carried out at high temp. .
why is osmotic pressure preferred? Give reasons for the following : Measurement of osmotic pressure method is preferred for the determination of molar masses of macromolecules such as proteins and polymers. Protein is the high molecular mass material the magnitude of colligative property depends inversely on the molecular mass and osmotic pressure.
Similarly, you may ask, why osmotic pressure is a Colligative property?
The osmotic pressure is proportional to the concentration of solute particles ci and is therefore a colligative property. As with the other colligative properties, this equation is a consequence of the equality of solvent chemical potentials of the two phases in equilibrium.
Which Colligative property is best for molecular mass?
Osmotic pressure is the best property to determine the molar mass of biomolecules because it contains concentration in terms of molarity.
13 Related Question Answers Found
Why is molarity used for osmotic pressure?
In other terms, osmotic pressure is the extra pressure that must be applied in order to prevent osmosis. Experimental data shows that this pressure is directly proportional to the molarity (number of moles of solute per litre of solution) of the solution at a certain given temperature.
What are the advantages of osmotic pressure?
Osmotic pressure has advantages for finding out the molar mass over other collegative properties as pressure measurement is around room temperature and molarity is used instead of molality. Osmotic pressure can be determined at any (room)temperature,while others methods are carried out at high temp. . At high temp.
What are the 4 Colligative properties?
The four commonly studied colligative properties are freezing point depression, boiling point elevation, vapor pressure lowering, and osmotic pressure. Since these properties yield information on the number of solute particles in solution, one can use them to obtain the molecular weight of the solute.
Why is osmotic pressure preferred to find molar mass of macromolecules?
Osmotic pressure measurement is preferred for molar mass determination because : (a) even in dilute solution the osmotic pressure values are appreciably high and can be measured accurately.
Is boiling point a Colligative property?
The boiling point of a solvent will increase when a solute is dissolved in it. The elevation of the boiling point is directly dependent on the amount of solute present in the solution, but it is not based on the identity of the solute, so it is considered a colligative property.
What are the three Colligative properties?
Three important colligative properties of solutions are vapor-pressure lowering, boiling-point elevation, and freezing-point depression.
How can osmotic pressure be used?
Osmotic pressure is the basis of filtering (“reverse osmosis”), a process commonly used in water purification. The water to be purified is placed in a chamber and put under an amount of pressure greater than the osmotic pressure exerted by the water and the solutes dissolved in it.
What are Colligative properties give examples?
Examples of colligative properties include vapor pressure lowering, freezing point depression, osmotic pressure, and boiling point elevation.
Is Osmosis a Colligative property?
Osmotic pressure is a colligative property, meaning that the osmotic pressure depends on the molar concentration of the solute but not on its identity. Osmosis is a vital process in biological systems, as biological membranes are semipermeable.
Is Osmosis a Colligative property of dilute solutions?
12.4 Colligative Properties of a Dilute Solution. The colligative properties of a solution are usually considered to be: Osmotic pressure: the increase in the pressure of the solution that places the solvent in transfer equilibrium with pure solvent at the same temperature and pressure as the original solution.
Why lowering in Vapour pressure is not a Colligative property?
Colligative properties of solution are those which do not depend upon the nature of solute but on the quantity of solute in a solution. So this takes lowering of vapour pressure out of the question because vapour pressure and it’s decrease would depend upon the nature of solute.
How you determine the molecular weight of solid by osmotic pressure method?
The flow of solvent that occurs due to a concentration gradient across the membrane is called osmosis. According to equation (3), the molecular weight of a solute can be obtained by plotting osmotic pressure divided by c versus concentration and extrapolating the data back to c = 0.
Why do we use molarity for Colligative properties?
Colligative properties are physical properties of solutions, like boiling point elevation and freezing point depression. This is why we use molality (moles solute per kg of solvent) since the kg of solvent doesn’t change with temperature.