How do we do this experiment?
We use the white vinegar to dissolve the eggshells so that only the clear, see-through membranes remain to hold everything together.
Why does the vinegar make the eggshells disappear?
Eggshells are made of calcium carbonate and vinegar contains acidic acid, which separates the calcium from the carbonate. The calcium dissolves into the vinegar, the carbonate bubbles away as carbon dioxide, just like your breath! Eggshells have a thin membrane inside which you may have seen if you've peeled a hardboiled egg. Once that eggshell has dissolved, the membrane holds the raw egg intact. You can even bounce them!
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