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Raoult’s law
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pressure and partial pressures
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Raoult’s law

chemistry
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pressure and partial pressures
pressure and partial pressures Figure 3: Total pressure and partial pressures for the system benzene–carbon disulfide at 25° C (see text).

Raoult’s law is a principle in chemistry that describes the behavior of solutions. It states that, at a constant temperature, the partial pressure of a component in a liquid mixture is directly proportional to its mole fraction in that mixture. This law is fundamental to understanding solutions, though few real solutions perfectly adhere to it.12

The law was formulated by French chemist Fran\u00e7ois-Marie Raoult. It helps determine the molecular weights of dissolved substances and relates changes in properties like vapor pressure, boiling point, and freezing point to the amount of solute present. Solutions that follow Raoult's law are termed ideal solutions.23

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4 Britannica Sources
  1. azeotrope: Top Questions
  2. François-Marie Raoult
  3. ideal solution
  4. liquid - Raoult’s law

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