Electromotive force studies of dilute aqueous solutions of hydrochloric acid + methyl-substituted ammonium chloride mixtures at 25°C

Abstract

Measurements are reported with the cell H₂, Pt|HCl(aq)m₁, MClm₂|Ag, AgCl with M = MeNH⁺₃, Me₂NH⁺₂, Me₃NH⁺ at 25°C and total ionic strength 0.100 00 mol kg^–1. The results are interpreted in terms of specific interaction of ions of unlike charge and specific interaction coefficients, B_M,Cl, are derived for the various methylammonium chlorides. There is a steady decrease in the activity coefficient as methyl groups are introduced into the ammonium cation.