Osmotic coefficients and activity coefficients of methylsubstituted ammonium chlorides and ammonium methyl sulphates in water at 25°C

Abstract

Osmotic coefficients and activity coefficients derived from vapour pressure osmometer measurements are reported for the salts MeNH₃Cl, Me₂NH₂Cl and Me₃NHCl and the series of salts MMeSO₄ where M = NH⁺₄, MeNH⁺₃, Me₂NH⁺₂, Me₃NH⁺ and Me₄N⁺. Both series of salts show a steady decrease of ϕ and γ with increased methyl substitution in the ammonium ion.