Potassium fluoride is very soluble in glacial acetic acid and the solutions have a number of unusual properties. In an attempt to understand them, freezing point depression were obtained by taking a solution of known molality and then diluting it several times:
b/(mol/kg) -- delta T/K
0.015 0.115
0.037 0.295
0.077 0.470
0.295 1.381
0.602 2.67
Calculate the apparent molar mass of the solute and suggest an interpretation
Use delta H fusion = 11.4kJ/mol and T*f = 290K