In this chemistry lesson, students learned about the preparation of different types of salts, specifically normal salts, acidic salts, and basic salts. The lesson covered how normal salts form when metal ions completely replace hydrogen ions in an acid, while acidic salts result from the partial replacement of hydrogen ions. Additionally, the concepts of soluble and insoluble salts were explained, with examples such as sodium chloride being soluble in water and silver chloride being insoluble. By the end of the lesson, students should be able to identify the methods for preparing various salts and understand their applications.