What is the boiling point of an aqueous 1.0 m solution of glucose?
K_b(H₂O) = 0.51 ° C/ m ; bp(H₂O) = 100.0 ° C.

Question

What is the boiling point of an aqueous 1.0 m solution of glucose? K_b(H₂O) = 0.51 ° C/ m ; bp(H₂O) = 100.0 ° C.

Quizplus · Accepted Answer

The boiling point elevation of a solution can be calculated using the formula ΔTb = iKbm, where ΔTb is the boiling point elevation, i is the van't Hoff factor (which is 1 for glucose, a non-electrolyte), Kb is the ebullioscopic constant of the solvent (water in this case, 0.51 °C/m), and m is the molality of the solution (1.0 m). Thus, ΔTb = 1 * 0.51 * 1.0 = 0.51 °C. The boiling point of the solution is then the normal boiling point of water (100.0 °C) plus the elevation (0.51 °C), which equals 100.5 °C.

What Is the Boiling Point of an Aqueous 1