An aqueous solution containing 10.0 g of starch per liter has an osmotic pressure of 3.8 mm Hg at 25°C.
(a) What is the average molar mass of starch?
(The result is an average because not all starch molecules are identical.)
(b) What is the freezing point of the solution? Would it be easy to determine the molecular weight of starch by measuring the freezing point depression? (Assume that the molarity and molality are the same for this solution.)