Final answer:
The solution formed by dissolving glucose in water has the lowest boiling point because glucose does not dissociate into ions.
Therefore, the correct answer is: option "dissolving 0.75 mol of glucose (c6h12o6) in 1.00 kg of water".
Step-by-step explanation:
In order to determine which solution has the lowest boiling point, we need to consider the number of particles that each solute dissolves into when dissolved in water. The solution with the lowest boiling point will have the least number of particles.
Each mole of Ca(NO3)2 separates into three ions when dissolved in water (1 mole of Ca²⁺ ions and 2 moles of NO3⁻ ions). Therefore, this solution will have the highest boiling point.
The solutions formed by dissolving Na3PO4 and KCl both contain one mole of solute per liter of water. However, Na3PO4 separates into four ions (3 Na⁺ ions and 1 PO4³⁻ ion) while KCl only separates into two ions (1 K⁺ ion and 1 Cl⁻ ion). Therefore, the solution formed by dissolving Na3PO4 will have a higher boiling point than the one formed by dissolving KCl.
The solution formed by dissolving glucose (C6H12O6) in water does not dissociate into ions and therefore does not contribute to an increase in boiling point. Therefore, this solution will have the lowest boiling point among the given options.