The training manual consists of three parts and a reference annex. The theoretical part contains the foundations of qualitative research and quantitative calculation of ion equilibria in aqueous electrolyte solutions: acid-base, dissolution equilibria, complex formation, oxidation-reduction, typical examples of calculations are analyzed in detail .. The second part of the manual contains a large number of questions and tasks of varying degrees of complexity, designed both for independent work of students and for performing control tasks on the topics studied. The second edition includes two new sections: an experimental part, which provides a description and methodology for performing four laboratory works, and a reference annex. Designed for first-year university students studying in the direction and specialty Chemistry . Will be useful to students of chemical-technological specialties and teachers of general and inorganic chemistry.