This homework assignment comprises student activity sheets exploring the concepts of chemical reactions, physical changes, and thermal energy within the context of dissolving potassium chloride (KCl) and sodium chloride (NaCl) in water. Students are tasked with conducting experiments, recording observations, and analyzing the results to determine whether dissolving salt is a physical or chemical change, and how it affects temperature. The assignment includes questions about the process of dissolving, the role of thermal energy, and the evidence that distinguishes physical and chemical changes. Students are also asked to develop models, analyze data, and engage in class discussions to consolidate their understanding of these core chemistry principles. Furthermore, the assignment incorporates home learning activities that involve designing and conducting experiments to investigate the behavior of salt in water, reinforcing the practical application of the learned concepts. The assignment also includes references to scientific literature to support the concepts discussed.
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