RAOULT, FRANCOIS MARIE.

Sur les Tensions de Vapeur des Dissolutions.

Paris, G. Masson, 1890. Contemp. hcalf. Light wear along edges. Two small stamps on verso of titlepage. In "Annales de Chimie et de Physique", 6. Series - Tome XX. 576 pp. The entire volume offered. Raoult's paper: pp. 297-371. Clean and fine.

First printing of an importent paper in which Raoult gives further applications of his own discovery, "Raoult's Law"

"Raoult soon turned to the anomalous results with salts in water, which had puzzled previous investigators. He classified the salts he used according to the valence of the radicals and found that the lowering of the freezing point could be accounted for by assigning certain numbers to these radicals. He demonstrated that the freezing point lowering obtained with these salts was consistent with the hypothesis that the salt radicals themselves acted as if they existed independently in the solution, and that certain radicals were more effective than others in lowering the freezing point of water. With the statement that "the neutral salts of mono and di-basic salts act as if the electropositive and electronegative radicals of these salts when dissolved in water solution do not combine, but remain as simple mixtures (in the paper offered), Raoult showed that he had come to accept much of Arrhenius’ work on ionization."(DSB).

Order-nr.: 46033