FeCl₃ has a van't Hoff factor of 3.4. What is the freezing point of an aqueous solution made with 0.81 m FeCl₃? (Kf for water is 1.86 °C/m)

Answer 1

∆T = imK

∆T = (3.4)(0.81)(1.86)

∆T = 5.12 degrees

Freezing point of solution = -5.2 degrees C