This book offers exemplary solutions to chemistry problems, in which it is shown to young people that in addition to a full and complete representation of the chemical properties of substances by means of chemical equations, a commentary on the processes involved is also necessary. Problems with appropriate solutions can be the basis for a good preparation in chemistry, for national competitions, for national and international chemistry Olympiads, but also for gaining the in-depth knowledge necessary for successful performance during the study of chemistry, as well as medicine at university, and then in a professional career.