This project demonstrates a basic acid-base chemical reaction by building a model volcano that erupts with 'lava' made from baking soda and vinegar. It's a visually exciting and highly engaging experiment for all ages.
If vinegar (an acid) is mixed with baking soda (a base), then a chemical reaction will occur, producing carbon dioxide gas that will create a fizzing eruption, simulating a volcano.
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Place the plastic bottle in the center of the tray.
Use the modeling clay to build a volcano shape around the bottle, leaving the opening clear.
Use the funnel to add the baking soda to the bottle.
In a separate cup, mix the vinegar, red food coloring, and dish soap.
When you are ready to start the eruption, quickly pour the vinegar mixture into the bottle.
Observe the eruption.
Record your observations about the 'lava' flow and the fizzing reaction.
When the vinegar and baking soda mix, they will immediately start to fizz and bubble, creating a foam that erupts from the top of the bottle. The red food coloring will make the foam look like lava, and the dish soap will make the eruption last longer by trapping the gas bubbles.
The mixing of baking soda and vinegar.
The eruption of 'lava' from the volcano.
The amount of baking soda and vinegar used, the size of the bottle opening.
This experiment should be done on a tray or outdoors to contain the mess. While the ingredients are household items, avoid getting the mixture in your eyes.
Perform the eruption live during your presentation for a dramatic effect.
Explain the chemical equation for the reaction: NaHCO3 + HC2H3O2 -> NaC2H3O2 + H2O + CO2.
Have a poster with diagrams showing the parts of a real volcano to compare with your model.
