Science

Understanding what happens at the particulate level when ionic compounds dissolve in water is difficult for many students, yet this understanding is critical in explaining many macroscopic observations. This article describes a student-centered activity designed to help strengthen students’ conceptual understanding of this process at the particulate level and translate this understanding to the symbolic level. In this activity, students use magnetic models to explore how mono- and polyatomic ions interact with water molecules and with each other.

The recent revisions to the advanced placement (AP) chemistry curriculum promote deep conceptual understanding of chemistry content over more rote memorization of facts and algorithmic problem solving. For many teachers, this will mean moving away from traditional worksheets and verification lab activities that they have used to address the vast amounts of content in the AP chemistry course. Moreover, a substantial shift in teachers’ beliefs about teaching and learning of chemistry will be needed to facilitate the transformation of their instructional practices.