Friday, March 14, 2025

Which labs are typically performed in a high school Chemistry class?

 Many home-school families use Apologia’s Chemistry textbook.  There are 25 labs in the textbook.  However, other families create their own programs or wonder which labs are really essential.  I get it.  You may worry about the costs.  Let me recommend some solid labs which won’t break the bank and will cover a wide range of chemical topics.

1. Atoms: Do Beanium.  It requires a mini scale and a mixed bag of dried beans.  Measure the Width of a Molecule.  The lab instructions suggest using chalk.  I use ground pepper.  Width of a Molecule is tough!  Here is the slide deck I prepared to help you work through the lab and calculations.

2. Acids and Bases: Test household Acid and Bases with litmus and pH papers.  Use tea, lemon juice, antacid tablets, baking soda, salt, tap water, clear soda, Epsom salts, etc.  

3. Measures: Plan to do a basic Measures Lab, Significant Figures, and Penny Density Lab.  Dig through a jar of pennies for pre-1982 (not 1983–the coins changed composition during 1982).  Plan to use at least ten Pennie’s to get accurate results.

4. Reactions: ACS has a Middle School program teaching chemical reactions using household materials: Chemical Change with What is a Chemical Reaction?Forming a Precipitate,  Energy Changes, and Neutralizing Acids and Bases.  There are clear instructions.  Many, many Middle School teachers do not have a background in Chemistry.  These labs and demos are safe, use household materials, and have clear explanations.

5. Stoichiometry: Can You Make 2 Grams?  This version uses calcium chloride (Driveway Heat) and sodium carbonate. Here is the slide deck I made for this lab.

6. Flame Test: Green Chemistry Flame Test uses Colorful Flame Candles.  Walmart sells these is the Party section

7. Gas Laws: Boyle’s Law Lab,  Cartesian Divers, and Charles’ Law Lab require pipets and condiment packets.  Save large yogurt containers to use instead of beakers. 

 



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