
Concept explainers
Match the vapor pressure diagrams with the solute-solvent combinations and explain your answers.
a. and
b. and
c. and
d. and
(a)

Interpretation:
The dissolution of the given following solute and solvent has to be explained using Raoult’s law.
Concept Introduction: Concept introduction:
Raoult's law:
The mole fraction of a solute is related to the vapor pressure of the solution thus,
Answer to Problem 69E
A Negative deviations from Raoult’s law is the right option for Acetone-Water solution.
Explanation of Solution
To find the second diagram match with Acetone and Water
The second diagram illustrates negative variation from Raoult's law. This occurs whilst the solute-solvent connections are stronger than the connections in pure solvent and pure solute.
These two molecules are named Acetone (
(b)

Interpretation:
The dissolution of the given following solute and solvent has to be explained using Raoult’s law.
Concept Introduction: Concept introduction:
Raoult's law:
The mole fraction of a solute is related to the vapor pressure of the solution thus,
Answer to Problem 69E
A Positive deviation from Raoult’s law is the right option for Ethanol-Water solution.
Explanation of Solution
To find the first diagram match with
The first diagram shows positive deviation from Raoult's law. This occurs when the solute-solvent connections are weaker than the connections in pure solvent and pure solute.
These two molecules are named Ethanol (
(c)

Interpretation:
The dissolution of the given following solute and solvent has to be explained using Raoult’s law.
Concept Introduction: Concept introduction:
Raoult's law:
The mole fraction of a solute is related to the vapor pressure of the solution thus,
Answer to Problem 69E
No deviation from Raoult’s law is the correct choice for Heptane-Hexane. solution.
Explanation of Solution
To find the polarity of Heptane and Hexane
Heptane and Hexane
The third diagram illustrates an perfect solution with no difference from Raoult's law. This occurs what time the solute-solvent interactions are concerning equal to the pure solvent and pure solute interactions.
These two molecules are named Heptane (
(d)

Interpretation:
The dissolution of the given following solute and solvent has to be explained using Raoult’s law.
Concept Introduction: Concept introduction:
Raoult's law:
The mole fraction of a solute is related to the vapor pressure of the solution thus,
Answer to Problem 69E
Heptane and Water results in positive deviations from Raoult’s law (the first diagram).
Explanation of Solution
To find: The Heptane Vs Water.
These two molecules are named Heptane (
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