14. Solutions

What mass in grams of CH₃OH (MM = 32.04 g/mol) would need to be added to 270.1 g of water in order to lower the freezing point of water by 12.0 °C? (Kf for water is 1.86 °C/m)

What mass, in grams, of NaCl needs to be added to 2.5 kg of water in order to create a solution with a freezing point of -5.4 °C? The freezing point depression constant of water is 1.86 °C/m.

A solution was prepared by dissolving 2.500 g of a non-dissociating solute in 125 g of pure water. The resulting solution has a freezing point of -0.190°C. The Kf of water is 1.86°C/m. What is the molar mass of the unknown solute?

Calculate the freezing point of an aqueous solution with 95.21 g of barium chloride (BaCl2) dissolved in 1750 mL of water. Assume complete dissociation and use the freezing point depression constant (Kf) for water as 1.86 °C/m.

What is the freezing point of a solution made by dissolving 59.5 g of CaCl2 into 100 g of H2O, given that the van't Hoff factor (i) for CaCl2 is 3 and the freezing point depression constant (Kf) for water is 1.86 °C/m?