Silver salt method
This method is used for determining the molecular mass of organic acids. Most of the organic acids form insoluble silver salts, which upon ignition decompose to give residue of metallic silver.
Molecular mass of the acid (where n is the basicity of acid)
This method is used for determining the molecular masses of the bases. This method is based on the fact that organic bases, i.e., amines, combine with chloroplatinic acid, H2PtCl6, to form insoluble double salts known as chloroplatinates or platinichlorides. These salts when ignited leave a residue of metallic platinum.
Molecular mass of base (where n is the acidity of base)