Final answer:
The boiling point composition curve for cyclohexane-toluene mixtures can be determined using the concept of vapor pressures.
Step-by-step explanation:
The boiling point composition curve for cyclohexane-toluene mixtures can be determined using the concept of vapor pressures. The vapor pressures of benzene and toluene, which approximate an ideal solution, can be plotted against their mole fractions to get straight lines.
For a mixture of cyclohexane and toluene, the total vapor pressure of the solution is the sum of the vapor pressures of the components. By varying the mole fraction of each component, a curve can be obtained that shows the boiling point composition relationship.