What happens when citric acid and baking soda meet water? What’s more dense; oil or water? How can you make millions of bubbles without blowing, stirring, or shaking something? These fun and easy labs are sure to get your students interested in density, chemical reactions, and making predictions & observations.
Materials You Will Need:
Clear plastic cups (to hold mixtures)
*the soap mixture overflows A LOT. Make sure this is mixed on a plate to catch the overflowing bubble mixture.
Straws (to blow bubbles with and to stir)
Citric Acid (a powder available at grocery stores in the spice aisle)
Food coloring (optional)
Magnifying Glass (optional)
Various liquids to test acidity (water, vinegar, OJ, lemon juice, soda, fruit punch)
Paper plates (to catch any overflow from the mixtures. Use every time.)
Students will learn quickly that when a chemical reaction occurs in a liquid, fizz and bubbles are not far behind! This is because carbon dioxide is being released. Because they are released in a liquid, we see them as bubbles until they reach the surface and pop. When baking soda, which is a base, is mixed with citric acid, which is an acid, the gas is released.