Make CHALK!
Here’s a simple and fun lab to do with your students that’s educationally jam-packed. Aqueous solutions of sodium carbonate, (can also use baking soda), and calcium chloride, (aka Ice Melt), and you get calcium carbonate, (basically chalk) and table salt. Students collect the insoluble chalk by filtration and the salt remains in solution. Dry the precipitation to calculate the percent yield, and if you have time, evaporating the water from the saline solution and voila, you have yo