Answer to Question #169608 in Physical Chemistry for Ulysses

Question

The Debye – Huckel limiting law gives the mean activity coefficient, log γ± = -A z+z- (I)1/2

   Where A is a constant, and I is the ionic strength ( mol/dm3). Obtain an expression for d log γ± / d I

Answer 1

According to the Debye-Hückel limiting law, γ_± is less than 1 in dilute solutions of electrolyte. ... However, according to the Debye-Hückel limiting law, γ_± is proportional to the charge product z₊|z_-|