Today we are exploring the wonderful world of chemistry with an acid-base experiment. Using household ingredients, we create a reaction that (if we’re lucky) makes a Ziploc bag explode!
Ingredients:
1/2 cup Vinegar
2 Tablespoons Baking Soda
Ziploc bag
Paper towel (ripped into a square)
3/4 cup water
Food coloring (optional)
Vocabulary:
Atom - the teeny-tiny building blocks that make up all matter in the universe. Kind of like Legos.
Ion - atoms or groups of atoms with an electrical charge, either positive or negative.
Acids and Bases - special chemicals that contain lots of ions, which makes them want to react with each other. Acids have lots of positive ions; bases have lots of negative ions.
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Higher-Level Science Explanation:
What’s really happening here is a two-part reaction. In step one, vinegar (acetic acid) reacts with the baking soda (sodium bicarbonate) to form sodium acetate and carbonic acid. In step two, the carbonic acid immediately falls apart into carbon dioxide and water. The bubbles you see are the carbon dioxide leaving the solution!
Equation: (for proper notation, see www.thoughtco....)
Step 1:
Sodium bicarbonate + acetic acid → sodium acetate + carbonic acid
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2CO3
Step 2:
Carbonic acid → water + carbon dioxide
H2CO3 → H2O + CO2
Once again, this production is brought to you by the University of Arizona's Community and School Garden Program. And Penny!
22 авг 2024
