Everyday use in chemical production operations requires a complex bundle of basic knowledge for calculating various operating parameters and variables. This includes the application of mass and heat balances, the ideal gas law, the mass action law and electrochemistry. In addition, there are calculations for the pumping of liquids and for scale enlargement. The present work covers this subject area in a clear manner in the form of exercises. The author knows from many years of practical experience that such calculations are often not isolated problems, but complex issues in which various subject areas are coupled together. This fact is taken into account in this exercise book. It presents in a short and concise form the everyday challenges of calculations in a chemical plant and offers ways of solving them. Special basic operations are not treated, and reference is made to special works that treat such topics in detail. This exercise book offers the possibility of deepening the knowledge of solving the calculations that occur daily in a chemical production plant.