Experiment procedure:

Put the egg in a larger cup and add vinegar so that the vinegar just doesn't go over the egg.

The egg will bubble up and grow in size day by day. Please leave it for 3 days. (It may be a bit long, but it's worth a try.)

After three days, the hard shell of the egg is gone, leaving only a soft translucent film, and it is 1.5 times larger than it was!

Conclusion: the egg shell was completely dissolved and bubbles were produced.

Analysis: The main component of white vinegar is acetic acid (acetic acid), and the composition of eggshells is mainly calcium carbonate. When the two are together, a chemical reaction occurs, producing carbon dioxide and calcium acetate.