Final answer:
To find the freezing point of the glucose solution, we calculate the molality of the solution, apply the freezing point depression formula, and subtract the result from water's freezing point.
Step-by-step explanation:
The question asks us to determine the freezing point of a glucose solution by calculating the depression in freezing point caused by the solute. To do this, we use the formula ΔTf = i * Kf * m, where ΔTf is the freezing point depression, i is the van't Hoff factor (for glucose, i=1, since glucose does not dissociate in solution), Kf is the freezing point depression constant for water (1.86°C/m), and m is the molality of the solution.
Here is the approach to answer this student's question:
- Calculate the moles of glucose using its molecular weight.
- Calculate the molality (m) of the solution by dividing the moles of glucose by the mass of the solvent in kilograms.
- Apply the formula for freezing point depression to find ΔTf.
- Subtract ΔTf from the normal freezing point of water (0°C) to find the solution's freezing point.