- Take a plastic or glass bowl.
- Put sodium bicarbonate in there and add diluted acetic acid. You can use baking soda and vinegar.
- Make a few bubbles over the bowl. The bubbles levitate!
Be careful with the acid.
Always follow general safety recommendations. Please note that conducting chemistry experiments you must comply with the relevant legal procedures in your country.
CH3COOH + NaHCO3 → CH3COONa + H2CO3
H2CO3 → CO2 + H2O
Carbon dioxide is formed the reaction between sodium bicarbonate and acetic acid. Actually, in this reaction an unstable carbonic acid H2CO3 forms and decomposes into carbon dioxide and water.
CH3COOH + NaHCO3 → CH3COONa + H2CO3.
H2CO3 → CO2 + H2O.
Carbon dioxide is denser than air and bubbles floating in "boiling" space of carbon dioxide. "Boiling" of gas is its uneven pulsating education. The carbon dioxide is dense enough to support the soap bubble film and the air inside.