Question

An aqueous solution of a nonvolatile solute has a boiling point of 102.45 degrees Celsius. Knowing that for water, Kfp = 1.86 degrees Celsius m^-1 and Kbp= 0.51 degrees Celsius m^-1. What is the molality of the solution? and what is the freezing point of the solution? Please show work.

Answer 1

Elevation of boiling point, AT, 102.45 °C-100.00°C 2.45 °C Calculate the molality of the using the following equation 2.45°C-0.512°C/mx m 2.45 °C 0.512 °C/m 4.79 m 71 K, of water is 1.86 °C/m 1.86°C/m x4.79m -8.90 °C Depression of freezing point, AT, - Tovent iuticn 7.34 °C-0.00C Toltion Tot.00 °C- 8.90°C =_ 8.90°C Hence, the freezing point of the solution is -8.90°c