Question

it is difficult to measure solution temperatures with an accuracy of better than 0.01 degrees C. which of the following is the most reasonable statement about using freezing point depression in an aqueous solution to determine the molar masses of biomolecules such as proteins?

A. no, it should not be possible because the change in temperature will be too large to measure correctly

B. no, it should not be possible because the change in temperature will be too large to measure accurately.

C. no, it should not be possible because there is no freezing point depression for aqueous protein solutions

D. no, it should not be possible because freezing point depressions are not directly related to molar masses

Answer 1

Actually A and B statements are same .

Actually out of A and B , in one statement there shoulde be word too small instead of too large .

Most reasonable statement -

No , it should not be possible because change in temperature will be too small to measure accurately.

Because proteins are very heavy molecules . Their molar masses will be very large . Thus molality of solution will be very low and there is less depression in freezing point and it is very difficult to measure it correctly.