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SOLUTIONS - LET'S UNDERSTAND EVERYTHING!!!!! A class dedicated to the study of solutions in chemistry, with a specific focus on the units of concentration, dilution and titration, developed with the aim of improving your knowledge in preparation for the National High School Exam (ENEM). We will explore the various units of concentration, essential for the analysis and understanding of the characteristics of chemical solutions. We will delve into concepts such as grams per liter, moles per liter, percentages and parts per million, providing a solid foundation for solving complex problems related to the composition of solutions. The next step will lead us to the phenomenon of dilution. This process requires skill in manipulating concentrations, aiming to achieve desired proportions. We will work together to unravel the calculations involved in this context, enabling you to face challenges that demand mathematical dexterity and conceptual understanding. Finally, we will focus our attention on titration, a fundamental analytical technique in chemistry. We will address the precise determination of unknown concentrations, using specific indicators and techniques. This section will not only broaden your theoretical understanding, but will also develop your practical skills in the laboratory. The primary purpose of this class is to provide a comprehensive review, aligned with the ENEM requirements, in order to efficiently prepare you for challenges that may arise during the test. Delve deeper into this educational journey with us and be prepared to face the intricate aspects of chemical solutions in a solid and well-founded manner. I am available to clarify any doubts and further enrich your understanding of these fundamental concepts.