Which colligative property is generally preferred for determining the molar mass of high-molar-mass solutes such as proteins and polymers?
Answer and explanation
Correct answer: Osmotic pressure
Osmotic pressure is preferred for macromolecules because it can be measured using very dilute solutions and usually at or near room temperature. The other colligative changes, such as boiling-point elevation and freezing-point depression, become extremely small for high-molar-mass solutes and are therefore less accurate. The relation π = cRT is especially useful for calculating molar mass. Hence, option A is correct.
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What is the correct answer to this question?
Osmotic pressure
Why is this the correct answer?
Osmotic pressure is preferred for macromolecules because it can be measured using very dilute solutions and usually at or near room temperature. The other colligative changes, such as boiling-point elevation and freezing-point depression, become extremely small for high-molar-mass solutes and are therefore less accurate. The relation π = cRT is especially useful for calculating molar mass. Hence, option A is correct.
Which subject and chapter does this question cover?
This is a Class 12 Chemistry question. Chapter: Chapter 01: Solutions. Topic: 6: Molar Mass Determination.
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