Chapter 13, Problem 133QRT

(a)

Interpretation Introduction

Interpretation:

The boiling point of a solution that is $\text{59}\text{.0\%}$ ethanol by mass has to be determined by plotting the graph.

(b)

Interpretation Introduction

Interpretation:

The molarity and the molality of the $\text{67}\text{.0\%}$ solution has to be calculated.

Concept introduction:

Molality: Dividing the moles of solute by the mass of solvent in kg.

  $\text{Molality}\text{=}\frac{\text{Moles}\text{of}\text{solute}}{\text{Mass}\text{of}\text{solvent}\text{in kg}}.$

Molarity: Dividing moles of solute by the volume of solution in Liter.

  $\text{Molarity}\text{=}\frac{\text{Moles}\text{of}\text{solute}}{\text{Volume of solution in L}}$.