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Science Tuition Presents François Raoult

Science Tuition Presents François Raoult

Greetings and welcome back to Science Tuition. We hope our chemistry enthusiasts are having fun and learning a lot from our lessons.

Continuing with our previous topic let us see which famous chemist we are doing our research today.

It is François-Marie Raoult. You sure might have heard about Raoult’s law. He was born on 10 May 1830 and was a French chemist. The achievement that put him on the map is when he researched the behavior of solutions, focusing on their physical properties. He formulated his law, known as Raoult’s law in which he stated 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.” And it relates that the vapor pressure of a solution to the number of molecules of solute dissolved in it.

Despite his family encouragement, Raoult lacked the financial resources to complete his work at the University of Paris. But he presented a brief note on electrolytic transport and on electrical endosmosis to the Academie des Sciences. In 1853 Raoult was employed as a teacher at the Lycee in Reims, then he moved to the college of St. Die as regent de physique. At St. Dié he received the baccalauréat ès lettres and baccalauréat ès sciences, passed the licencié examination, and were appointed an agrégé de l’enseignement secondaire spécial. In 1862 he moved to the lycee at Sens, and there he carried out research on the electromotive force of voltaic cells; this research got him the docteurès sciences physiques in 1863 from the University of Paris.

Raoult taught at the University of Grenoble from 1867 and was a professor there from 1870 until his death. In 1866 it was discovered by him that the freezing point of an aqueous solution is lowered in proportion to the amount of non electrolytic substance dissolved. This observation led to the expression of Raoult’ law which states that the changes in certain related properties of a liquid(e.g., vapor, pressure, boiling point, or freezing point) that occur when a substance is dissolved in the liquid are proportional to the number of molecules dissolved present for a given quantity of solvent molecules.

That is all for today in Science Tuition. Stay tuned in to learn more.

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