Limitations of Raoult’s law
Although there are many useful applications of Raoult’s law, it has some limitations discussed as follows:
- Raoult’s law is applicable to ideal solutions only but majority of solutions are non ideal in nature, thus we may not get an accurate estimate for vapour pressure of non ideal solutions by using Raoult’s law only.
- Raoult’s law assumes that the vapour pressure of solution remains unchanged with temperature but for various substances vapour pressure changes with temperature. So, Raoult’s law may not give accurate results for the cases where temperature changes significantly.
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Raoult’s Law
Raoult’s Law in chemistry relates partial pressures of volatile liquid components to their mole fractions in a liquid solution. It states that the partial pressure of each component in the solution is directly proportional to its mole fraction. Thus, it helps us to calculate the total vapour pressure of the solution. Based on Raoult’s law, liquid solutions are classified as Ideal Solutions and Non-Ideal Solutions.
In this article, we will discuss the definition of Raoult’s law, ideal and non-ideal solutions, Raoult’s law for non-volatile solutes and some solved numerical problems based on Raoult’s law.
Table of Content
- Raoult’s Law Definition
- Raoult’s Law Formula
- Classification of Solutions based on Raoult’s law
- Raoult’s law for Non-Volatile Solutes
- Raoult’s Law with Other Laws
- Significance of Raoult’s Law
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