What are the mole fractions of H_3PO_4 and water in a solution of 14.5 g of H_3PO_4 in 125 g of water? Nitric acid is usually available at 70% (by mass) aqueous solution with a density of 1.42 g/mL. Calculate the molarity, molality, and mole fraction of this solution. A solution prepared by dissolving 3.00 g of ascorbic acid (vitamin C, C_6H_12O_6) in 50.0 g of acetic acid has a freezing point that is depressed by delta T = 1.33 degree C below that of pure acetic acid. What is the value of the molal freezing point depression constant for acetic acid? delta T_f = K_f m solution contains a mixture of sugars: 0.50 mole fructose, 0.50 mole glucose, 0.5 maltose, 0.50 mole sucrose dissolved in 1.00 kg of water. What are the freezing and boiling points of the solution? K_f for water is 1.86 degree C/m, and K_b = 0.512 delta T_f = K_f m: delta T_b = K_b m.