This week we had more color changing fun in science.... and the kids really enjoyed our "underwater" volcano.... as the volcano changed from basic to acidic the color changed....it made a very pretty volcano....much like a lava lamp with lots of ever-changing floating bubbles... (due to the oil)
How we made it:
Fill the Test Tube (smaller glass/bottle) about 1/3 full....add 1/2 tsp baking soda and gently stir/shake to dissolve.... the water at this point will still be clear(ish)
Add 1/4 tsp of Red Cabbage juice powder and gently shake the test tube until it is uniformly blueSlowly pour Vegetable Oil into the test tube almost up to the lip
Measure 1/2 tsp of citric acid...then drop the citric acid into the test tube
After the reaction dies down, add another 1/2 tsp of citric acid and set the eruption off again. If you still want it to erupt and change to another color you can add in 1/2 baking soda....The End.....
For more fun science projects go check out Adventures in Mommydom.....