During the winter, airport crews apply de-icing agents to ai…
During the winter, airport crews apply de-icing agents to airplane wings to prevent ice formation. One common de-icing solution is a mixture of propylene glycol (C3H8O2) and water. This is essential for flight safety, as ice accumulation can dangerously alter the wing’s aerodynamics. An aircraft maintenance engineer is preparing a new batch of de-icing fluid. They mix kilograms of propylene glycol (C3H8O2, molar mass of 76.09 g/mol) with liters of pure water. What is the resulting freezing point (in oC) of this de-icing solution? Assume the following: Pure water has a density of 1.000 g/mL and a normal freezing point of 0.00oC. Propylene glycol is a non-electrolyte. The molal freezing point depression constant (Kf ) for water is 1.86oC/molal. Add your answer using 3 significant figures.