A solution is prepared by dissolving 1.00 g of a nonvolatile solute in 15.0 g acetic acid. The boiling point of this solution is 120.17 °C . Use the data in Table 12.4 to fi nd the molar mass of the solute.
Strategy

Solve this problem in two stages:
1. Calculate the number of moles of solute in the sample.

2. Calculate the molar mass by dividing the mass of the solute by the number of moles.

From the boiling point of the solution and the information given in Table 12.4 for the solvent, acetic acid, you can calculate the molality.

Table 12.4

Transcribed Image Text:

Boiling point elevation of solution k for acetic acid Molality of solution Mass of solvent Moles of solute in sample