Lesson Plans Chemistry - Drill on Elements (Infobahn Xpress) Provides interactive drills or exams. Chemistry - Paper Chromatography (Seely) Provides a lesson using common materials available in a classroom for separating chemicals into component parts. 12-02 Chemistry - Separating the Components of River Water (Seely) Provides a lesson using common materials available in a classroom. 2-00 Chemistry - Solving an Acid Base Problem (Van Bramer) Provides steps for solving an acid base problem. 12-02 Chemistry - Water and Ice Density (New York University - Mathmol) Provides an experiment that can be performed in a typical classroom to determine the densities of water and ice. 10-01