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Which property allows osmotic pressure to be especially useful for determining the molar mass of macromolecules (proteins, polymers)?
AIts magnitude is large even for very dilute solutions, and measurements occur near room temperature using molarity
BIt requires heating to high temperature
CIt is independent of solute concentration
DIts magnitude is small even for concentrated solutions
Answer & Solution
Correct answer: A. Its magnitude is large even for very dilute solutions, and measurements occur near room temperature using molarity
Osmotic pressure is **large even for dilute solutions** and measurable at **room temperature** — crucial for biomolecules that denature on heating. It also uses **molarity** rather than molality (convenient for solutions).
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