Final answer:
The molal concentration of glucose in the solution is calculated to be approximately 2.34 mol/kg, using the freezing point depression constant for water and the freezing point of the solution.
Step-by-step explanation:
The subject of this question is to calculate the molal concentration of glucose in a solution using the freezing point depression method. Molality (m) can be found using the equation ΔTf = Kf x m, where ΔTf is the depression in freezing point, and Kf is the molal freezing-point depression constant. To find the molality, rearrange the equation to m = ΔTf / Kf. Given that the solution freezes at -4.35°C and the Kf value for water is 1.86°C/kg*mol, the molality can be calculated as m = 4.35°C / 1.86°C/kg*mol, which gives a molality of approximately 2.34 mol/kg for the glucose solution.