Question

What is meant by an "ideal" solution?

   What is meant by an "ideal" solution?

General Chemistry

General Chemistry

Donald A. McQuarrie,… 4th Edition

Chapter 16, Problem 63

Instant Answer

Solved by Expert Nicole Smina

10/12/2021

Step 1

An ideal solution is defined as a solution where the energy change (delta H) associated with mixing is essentially zero. This can be represented as: \[ \Delta H_{mix} = 0 \] Show more…

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What is meant by an "ideal" solution?

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Key Concepts

Raoult's Law

In an ideal solution, Raoult's Law applies across the entire range of concentrations. This law states that the partial vapor pressure of a component in the solution is directly proportional to its mole fraction. The strict adherence to Raoult's Law is a hallmark of ideal behavior, reflecting the uniformity of intermolecular interactions in the mixture.

Ideal Solution

An ideal solution is a model where the interactions between different components are identical to those in their pure forms. This means that when two substances are mixed, their intermolecular interactions do not change as a result of mixing, leading to predictable and proportional changes in physical properties such as vapor pressure and boiling point across all compositions.

Intermolecular Forces

The concept of ideality relies on the assumption that the forces of attraction or repulsion between like and unlike molecules are equivalent. Equalizing these forces means that the enthalpy and volume changes upon mixing are negligible, resulting in an absence of energetic or volumetric deviations from ideal behavior.

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