DebyeHückelGesetz
Debye-Hückel-Gesetz is a relation in physical chemistry that describes how the activity coefficients of ions in dilute electrolyte solutions depend on ionic strength. It quantifies deviations from ideal behavior caused by electrostatic interactions among ions in a solvent, typically water.
The law was formulated by Peter Debye and Erich Hückel in the early 1920s. It rests on
Two closely related forms are used. The Debye-Hückel limiting law (for very dilute solutions) states that log10
For water at 25 °C, typical values are A ≈ 0.509 (mol/L)−1/2 and B ≈ 3.290 Å−1 (mol/L)−1/2.