This lab, presented by the National Nanotechnology Infrastructure Network, covers the concept of chemical reactions. Students will learn how "a flow of electrons allows cations in solution to revert to a solid state while plating an object" as well as "the process which allows the ions of the plating solution to be replenished, and how this results in a loss of mass for the solid metal electrode." Teacher Preparation Guides, Student Guides, and Next Generation Science Standards applicable to the lesson are included.