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 assembled into groups and gathered around lab stations to gain experience diluting a 3.0 M stock solution to a 1.5 M solution. They also observed how two different volumes of a solution with the same concentration both appear the same color. 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.
The Art of Science 