Curated OER
Isolation of Synthetic Chemicals from Plant Leaves
Students isolate and identify a dye, which represents a synthetic pesticide, from plants.
Curated OER
Designing a Flotation Strategy for the Purification of Recycling
Twelfth graders work in teams to design a method of recycled plastics purification by flotation. They base their design on the concept that different kinds of plastics have different densities and keep overall costs and purification time...
TeachEngineering
Teach Engineering: Chromatography Lab
To increase students' awareness of possible invisible pollutants in drinking water sources, students perform an exciting lab requiring them to think about how solutions and mixtures exist even in unsuspecting places such as ink. They use...
Annenberg Foundation
Annenberg Learner: Virtual Particle Lab: Dissolving
Explore what happens when one substance dissolves into another. Run the simulations and see if you can predict the results.
University of Virginia
University of Virginia: More on Temperature and Solubility
Lab set up to compare the effect of temperature on the solubility of two solutes (NaCl and KNO3).
Science Education Resource Center at Carleton College
Serc: Investigating Chromatography: Selecting Variables
For this lab, students will demonstrate observation skills as they design an experiment to separate colors of various water-based pens in order to learn about mixtures and solutions. Students will determine a variable to test and...
Science Education Resource Center at Carleton College
Serc: Mn Step: Spotting Chromatography
A lab activity that introduces chromatography using markers, plus water and acetone as the solvents. Learners will take measurements to compare the mobile and stationary phases of the inks, and find the polarity of the inks and solvents....
Khan Academy
Khan Academy: Molarity vs. Molality
Learn how molarity and molality differ. The molality of a solution is equal to the moles of solute divided by the mass of solvent in kilograms, while the molarity of a solution is equal to the moles of solute divided by the volume of...
Other
How to smile.org: Solubility Test
Students can figure out what an unknown crystal is by comparing their dissolving test with the known and unknown crystals. This inquiry activity includes background information and student handout.