The composition of soap films
- 1 September 1925
- journal article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character
- Vol. 109 (749) , 28-34
- https://doi.org/10.1098/rspa.1925.0105
Abstract
In a recent article on “The Investigation of Properties of Thin Films by X-rays,” Sir William Bragg discusses the nature and composition of soap films and the black spots that form therein, He proceeded from the assumption that “the ordinary thick film is bounded on one side by a molecular film of oleic acid,'' such acid being formed by the “hydrolysis of the sodium or potassium oleate in solution.” The brief experimental investigation outlined below, carried out with solutions of sodium oleate whose degree of hydrolysis is known, shows that free oleic acid does not exist in soap films, but sodium soap is stored in the surface of a soap solution or soap bubble.This publication has 0 references indexed in Scilit: