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Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision ? [2000]
- a)Osmotic pressure
- b)Elevation of boiling point
- c)Depression of freezing point
- d)Relative lowering of vapour pressure
Correct answer is option 'A'. Can you explain this answer?
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Which of the following colligative property can provide molar mass of ...
Osmotic pressure is a colligative property which is used to find the molecular weight of polymer.
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Which of the following colligative property can provide molar mass of ...
Colligative properties depend on the number of solute particles present in a solution rather than their chemical nature. These properties are useful for determining the molar mass of proteins, polymers, and colloids, which are often difficult to measure directly.
Among the four colligative properties listed, osmotic pressure provides the molar mass of proteins with the greatest precision. This is because osmotic pressure is directly proportional to the number of solute particles present in a solution. Therefore, by measuring the osmotic pressure of a protein solution and comparing it with the osmotic pressure of a known concentration of a non-electrolyte solute, the molar mass of the protein can be determined accurately.
Explanation:
Osmotic pressure can be defined as the pressure required to prevent the flow of solvent into a solution through a semipermeable membrane. It depends directly on the concentration of solute particles present in a solution. Therefore, by measuring the osmotic pressure of a protein solution and comparing it with the osmotic pressure of a known concentration of a non-electrolyte solute, the molar mass of the protein can be determined accurately using the following formula:
M = (RT/P) × (1 + b/V2)
Where M is the molar mass of the protein, R is the gas constant, T is the absolute temperature, P is the osmotic pressure, b is the excluded volume of the protein, and V2 is the volume of the solvent.
Elevation of boiling point, depression of freezing point, and relative lowering of vapour pressure are other colligative properties that can be used to determine the molar mass of proteins. However, these properties are less precise than osmotic pressure because they depend on the nature of the solute particles as well as their concentration.
In conclusion, osmotic pressure is the most precise colligative property for measuring the molar mass of proteins, polymers, and colloids, as it directly depends on the number of solute particles present in a solution.
Among the four colligative properties listed, osmotic pressure provides the molar mass of proteins with the greatest precision. This is because osmotic pressure is directly proportional to the number of solute particles present in a solution. Therefore, by measuring the osmotic pressure of a protein solution and comparing it with the osmotic pressure of a known concentration of a non-electrolyte solute, the molar mass of the protein can be determined accurately.
Explanation:
Osmotic pressure can be defined as the pressure required to prevent the flow of solvent into a solution through a semipermeable membrane. It depends directly on the concentration of solute particles present in a solution. Therefore, by measuring the osmotic pressure of a protein solution and comparing it with the osmotic pressure of a known concentration of a non-electrolyte solute, the molar mass of the protein can be determined accurately using the following formula:
M = (RT/P) × (1 + b/V2)
Where M is the molar mass of the protein, R is the gas constant, T is the absolute temperature, P is the osmotic pressure, b is the excluded volume of the protein, and V2 is the volume of the solvent.
Elevation of boiling point, depression of freezing point, and relative lowering of vapour pressure are other colligative properties that can be used to determine the molar mass of proteins. However, these properties are less precise than osmotic pressure because they depend on the nature of the solute particles as well as their concentration.
In conclusion, osmotic pressure is the most precise colligative property for measuring the molar mass of proteins, polymers, and colloids, as it directly depends on the number of solute particles present in a solution.
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Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision ? [2000]a)Osmotic pressureb)Elevation of boiling pointc)Depression of freezing pointd)Relative lowering of vapour pressureCorrect answer is option 'A'. Can you explain this answer?
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