This week, students in Lower Secondary chemistry class dove into the fundamentals of chemical and physical reactions through interactive experiments. The focus was to understand how materials interact and react with one another, showcasing both chemical reactions and methods of separation.
In the first experiment, students tackled a mixture of iron filings (Fe) and flour. By using a magnet, they were able to separate the iron filings from the flour, observing how magnetism serves as a key method for separating mixtures based on physical properties. This hands-on exercise demonstrated the practical applications of magnetic separation, teaching students a critical technique in material science.
In the second experiment, students combined acetic acid (CH₃COOH) from vinegar with sodium bicarbonate (NaHCO₃), commonly known as baking soda. This acid-base reaction produced carbon dioxide (CO₂) gas, creating an exciting foaming effect that highlighted the basics of gas-producing reactions and chemical decomposition.
These experiments not only introduced students to foundational chemistry concepts but also allowed them to observe science in action. By learning how to separate mixtures and understanding chemical reactions, students gained valuable insights into real-world applications in fields like environmental science, cooking, and recycling. The day’s experiments sparked enthusiasm and deepened their appreciation for the science that surrounds us every day!