In this book, the authors, who taught engineering students for nearly three decades, summarize their chemical expertise in an understandable form. Various topics significant to all engineering disciplines have been newly processed from different lectures and supplemented in such a way that they can be understood even without accompanying lectures. Key areas of focus include materials science, semiconductors, water chemistry, electrochemistry, environmental protection, and energy. Important industrial products and sectors such as sulfuric acid, air liquefaction, ethylene, petroleum, lime, ammonia, sodium hydroxide, and chlorine are included as examples of chemical-technical processes. Exercises with solutions are provided to deepen the acquired knowledge.