Entry from British & World English dictionary
1A law stating that the freezing and boiling points of an ideal solution are respectively depressed and elevated relative to that of the pure solvent by an amount proportional to the mole fraction of solute. 1.1A law stating that the vapour pressure of an ideal solution is proportional to the mole fraction of solvent.
late 19th century: named after François-Marie Raoult (1830–1901), French chemist.
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