Which of the following aqueous solution will have the highest boiling point? — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Let us find the molar concentration of each solution: (a) 34.2% (w/v) sugar (C12H22O11, M = 342 g/mol) = 342 g of sugar in 1000 mL = 342 / 342 = 1.0 M. (b) 18% (w/v) glucose (C6H12O6, M = 180 g/mol) = 180 g of glucose in 1000 mL = 180 / 180 = 1.0 M. (c) 6.00% (w/v) urea (NH2CONH2, M = 60 g/mol) = 60 g of urea in 1000 mL = 60 / 60 = 1.0 M. All solutions are 1.0 M aqueous solutions of non-electrolytes. Therefore, they have identical boiling point elevations, and will have the same boiling point.