|Watching the Iron and Sulfur reaction.|
To open the unit, I gave my students a mixture of iron, salt, sand, and pebbles to separate. The lab groups made a flow chart with a detailed plan for obtaining pure samples of each of the four components. As an extra challenge, I asked them to collect enough data to calculate the mass percent of the parts of the mixture. I love starting the kids off with an inquiry lab that they really can't mess up. This particular mixture demonstrates several different physical properties and gives them a chance to learn some basic lab techniques. This lab is loosely based on Separation of a Mixture found in Flinn ChemTopic Labs: Volume 1, Introduction to Chemistry.
|The pure samples of iron, rocks, salt, and sand (green and brown sand).|
|Students working through the "Classification of Matter" POGIL|
|Sorting the "samples" into elements, compounds, and mixtures.|
|Watching the iron-sulfur reaction.|
|My labs are all over instagram!|
|The smell is all part of the experience.|