Nikolai Izmailov and the electrochemistry of solutions

The paper aims to pay tribute to scientific achievements of Nikolai Izmailov (1907-1961) to the solution chemistry. In the forties-fifties, Izmailov proposed the most detailed scheme of dissociation of electrolytes in solutions and considered the problem of the differentiating influence of non-aqueous solvents on the acids strength. He also generalized the concept of an unified acidity scale in different solvents, proposed several new methods for estimating Gibbs energy of ion solvation, and contributed a lot to the theory of physico-chemical analysis. Beginning from the thirties, Izmailov investigated the possibility to apply various indicator electrodes, especially glass electrodes, in organic solvents.