Baking soda and vinegar experiments begin with the classic science fair volcano and end with homemade rockets. It’s not surprising – this reaction creates bubbly, fizzing potions that are fun to create over and over.

Fizzing Baking Soda and Vinegar Valentines Hearts | Sick Science Steve Spangler Science

We decided to put a Valentines twist on the baking soda and vinegar experiment and try it with frozen hearts.

The best part? Even though this experiment stinks from all the vinegar, it’s safe to touch.

Fizzing Baking Soda and Vinegar Valentines Hearts | Sick Science Steve Spangler Science

Materials

  • Baking Soda
  • Vinegar
  • Water
  • Heart shape bowl, ice forms or cookie sheet molds
  • Spoon
  • Bowl or plate

Fizzing Baking Soda and Vinegar Valentines Hearts | Sick Science Steve Spangler Science

Let’s Try it! 

(Measurements aren’t exact and will depend on size of mold. Proportions are more important)
1. Combine 3/4 vinegar to 1/4 water in heart shaped mold and freeze.
2. Combine 3/4 baking soda to 1/4 water in heart shaped mold and freeze.
3. Place frozen vinegar heart in 3/4 baking soda and 1/4 water solution.
4. Place frozen baking soda heart in pure vinegar bath.

Fizzing Baking Soda and Vinegar Valentines Hearts | Sick Science Steve Spangler Science

We found the frozen baking soda hearts fizzed and reacted much more than the frozen vinegar hearts.

The Science Behind the Reaction

The baking soda (sodium bicarbonate) and vinegar (acetic acid) reaction actually occurs in two steps.

First, the acetic acid in the vinegar reacts with the sodium bicarbonate to make sodium acetate and carbonic acid. The carbonic acid is unstable and basically decomposes in a reaction that produces carbon dioxide gas. The CO2 gas escapes as bubbles. These bubbles are heavier than air, so they sink or run over the plate edge, versus taking flight.

Some people add dish soap to this reaction to capture the bubbles and help the solution flow. Try adding a squirt or two of dish detergent on top of your heart and see if anything different happens.

Or try different proportions of vinegar, water and baking soda. What are your results?

Fizzing Baking Soda and Vinegar Valentines Hearts | Sick Science Steve Spangler Science

Thanks to Inspiration Laboratories where we found this original idea.

3 replies
  1. Jacob
    Jacob says:

    What an interesting experiment! This looks like something I could try with the kids. I love the clarity and details in the pictures. Thank you for sharing this.

    Reply
  2. gogo girl
    gogo girl says:

    Thank you for your awsome website if I never would have found it I would have failed my science fair project thank you

    Reply

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