Solubility of Glucose Model

myminifactory

This model showcases the process of covalent compounds like glucose dissolving in water. Carbon atoms (black), oxygen atoms (pink), and water molecules are all represented to scale. Separate molecules can be printed on top of each other, allowing for a repeating structure that demonstrates how covalent compounds dissolve. By removing individual water molecules from the model, you can illustrate the process of dissolution. Files for printing this model on dual extruder printers (recommended) or single extruder printers are included. The glucose crystal file for a single extruder is too large to export as an STL, so a single layer that can be printed multiple times and glued together is provided instead. Students often struggle to understand the concept of solubility at the molecular level. This model helps demonstrate how a molecular compound separates into individual molecules when dissolved, making it easier for students to grasp this complex topic. The model also illustrates the structure of covalent crystals. Before using this model, students should be familiar with the differences between ionic and molecular compounds. Objectives include: * Describing the process by which a molecular compound dissolves in water * Explaining how water molecules interact with covalent compounds through intermolecular forces * Explaining why certain substances can form crystal structures To use this model, show students glucose or sucrose and ask what will happen when the molecules are dropped in water. Discuss what occurs on the macro level (it dissolves) and then ask students to draw what they think will happen at the molecular level. Set up a model of glucose with one or more layers of individual molecule pieces on top, then pour water onto the model by dropping water molecules included in the set onto it, knocking the individual molecules off the crystal. This can lead to discussions about how water molecules interact with glucose molecules through hydrogen bonds, why glucose molecules do not break apart, and how the surface of the crystal must dissolve before the interior.