When the temperature drops below freezing and ice and snow fall, roads and sidewalks can become icy and hazardous. To prevent accidents, transportation crews put NaCl on the pavement, which results in a lowering of the freezing point and helps melt the ice. Remember a colligative property of solutions is that they have a lower freezing point than the pure solvent. Work must be shown in order to earn credit.
What is the molality if 465 g of NaCl is added to 3.95 kg of water?
Calculate the new freezing point of this solution. As a reminder, NaCl breaks into Na+ and Cl-, allowing the salt to have a doubling effect on the freezing point change. The freezing-point depression constant for water is Kf = -1.86°C/m and ΔTf = m x Kf