This book is an analytical treatment of the subject, that enables the reader to design successfully chemical methods (such as separations) and predict the required conditions for such methods. Part 1 describes the ways of obtaining selective effects through the use of competing reactions in aqueous media. Part 2 investigates how modifications of chemical reactivity of solutes are produced by using nonaqueous solvents. Particular consideration is given to ionized molten salts and molecular organic and inorganic solvents. This is a broad ranging study of the field. It demonstrates the theory and methodology behind practical problems in solution chemistry and enables the reader to solve them effectively, taking into account the chemistry of the system. The work is elucidated by numerous examples provided in context plus nearly 200 problems at the end of the book.