Why the egg shell dissolve a little at 24 hours?

The eggshell dissolves over 24 hours primarily due to its calcium carbonate composition, which reacts with acids in the surrounding environment. If the egg is placed in a vinegar solution, for example, the acetic acid in vinegar reacts with the calcium carbonate, producing carbon dioxide gas and resulting in the shell's gradual dissolution. This process can also occur in water with a low pH, where acidic components lead to similar chemical reactions. As a result, the eggshell weakens and may begin to break down during this time.