Our work today involved thinking about solutions from a molecular perspective. Students briefly reviewed yesterday’s Gummy Bear portion of the lab via the ChemCatalyst on slide 3 of the Lesson 81 PowerPoint. Students then received the Lesson 81 Worksheet and the Particle Views Handout. The handout was used in Part 1 of the worksheet. For Part 2, students did the mental work of thinking through how to prepare solutions with different volumes and molarities. They then observed the outcome of preparing those solutions. The lesson helped illustrate the connection between molarity (M), particle density, and the number of moles (particle number) in a solution. Pictures from the white board are shown below.

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