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Fun science experiment to do at home
November 12, 2015
It's the most classic science experiment out there: What happens to an egg when you soak it in vinegar for over two days?
As demonstrated by SF Globe in the video below, after two days the vinegar dissolves the eggshell. The real magic? Two events occur. First, the egg bounces! Second, the egg yolk is completely unfazed by vinegar. Why does this happen? According to the Exploratorium, the egg shell contains calcium carbonate crystals, which are then broken down when interacting with the acetic acid in vinegar. The end-resulting membrane, after the shell dissolves, is also semipermeable and rubbery in texture, says Imagination Station.
As for the bubbles that appear? The Exploratorium site says, "The calcium ions float free (calcium ions are atoms that are missing electrons), while the carbonate goes to make carbon dioxide — the bubbles that you see."
Imagination Station suggests many fun additional science experiments you can run on a naked egg including testing the effects of the type of vinegar used (e.g., by varying concentration of acetic acid), temperature changes over the soak period (e.g., if you decide to refrigerate the mixture), and weight changes of the egg itself.
As with any easy and fun science experiment you can do at home, remember that safety is the most important element. Beyond that? Imagination Station warns, "I would NOT recommend eating a naked egg prepared this way."
Watch the video below for the full effect. Don't forget to check out 2:08 when the man in the video actually cuts open the egg after the two days. Let us know what fun science experiment you plan on trying at home.