To determine the molar mass of a small protein in the range of 20,000-40,000 g/mol,it would be best to measure
A)the freezing point of the solvent and of the solution and the weight of the solute and solvent.
B)the boiling point of the solvent and of the solution and the weight of the solute and solvent.
C)the vapor pressure of the solvent and of the solution and the weight of the solute and solvent.
D)the osmotic pressure of the solution and the weight of the solute and solvent.
E)the density of the protein and to make x-ray measurements.

Question

Quizplus · Accepted Answer

To determine the molar mass of a small protein in the given range, it would be best to measure the osmotic pressure of the solution and the weight of the solute and solvent. This is because osmotic pressure is directly proportional to the molar mass of the solute, and therefore, can be used to determine the molar mass of the protein. Other methods like measuring freezing point, boiling point, or vapor pressure may not be sensitive enough to detect such a small protein, while measuring density and making x-ray measurements may not directly give the molar mass of the protein.

To Determine the Molar Mass of a Small Protein in the Range