How did Svante Arrhenius’s dissociation theory influence Wilhelm Ostwald?

Svante Arrhenius’s dissociation theory was a foundational influence on Wilhelm Ostwald, providing the theoretical framework that helped define the new school of physical chemistry.1

When Ostwald received Arrhenius’s doctoral thesis in 1884, he immediately recognized its potential to explain chemical activity. He realized that the varying chemical strengths of different acids could be attributed to the concentration of active ions, which in turn depended on the degree of dissociation.1

By applying the law of mass action to this dissociation, Ostwald derived a mathematical relationship between the degree of dissociation, the concentration of the acid, and a specific equilibrium constant. This became known as Ostwald’s dilution law (1888), which he validated by measuring the electrical conductivities of over 200 organic acids.1

Ultimately, Ostwald championed the dissociation theory against widespread skepticism, integrating it into his textbooks and using it to revolutionize analytical chemistry. Together with Arrhenius and Jacobus Henricus van ’t Hoff, he formed the "triumvirate" that established a comprehensive theory of solutions based on thermodynamics and dissociation.12