Relief Teaching Ideas

Sharing ideas to help make relief teaching fun, enjoyable, and meaningful.

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Super Lemon Suds!

Science fun, with a little cleaning thrown in! 🙂

This simple science idea, showing the chemical reaction that occurs when you mix citric acid with bicarb soda, has the added fun of bubbles!

-Clear container or cup
-Measuring spoon
– Spoon or stirrer (I used a chopstick!)
– Liquid dish soap
– Bicarb soda
– Lemon cut in half

1. Put about 1 tsp of bicarb soda in cup.
2. Stir in about 1 tsp of dish soap.

3. Squeeze lemon juice into cup & give it a stir.
4. Watch the bubbles form & rise up!

When you mix citric acid (the lemon juice) with bicarb soda a chemical reaction occurs, creating carbon dioxide gas & water. The gas is seen as bubbles but when you add the dish soap it creates even more bubbles.

Students could test out what happens with different brands of dish soap, different amounts & ratios of the ingredients or what happens when you leave one of the ingredients out.
Students could also conduct an experiment on the cleaning power of the lemon/bicarb mixture.
After we finished making A LOT of bubbles we used the lemon scented mixture to clean the kitchen benches & sink.
If you did this experiment in the classroom the kids could wipe down their desks at the end of the lesson & it would leave the room smelling lemon fresh. Lemon is a safe, natural antibacterial cleaner!