What will happen if an egg is kept in a vinegar solution for 20-24 hours?
The egg shell will dissolve
The egg shell will dissolve is correct.
An egg shell is made mainly of calcium carbonate. Vinegar is a dilute solution of acetic acid.
The acid reacts with calcium carbonate to form soluble calcium acetate, water and carbon dioxide, which appears as bubbles on the shell: \(\mathrm{CaCO_3 + 2CH_3COOH \rightarrow Ca(CH_3COO)_2 + H_2O + CO_2}\)
After 20–24 hours the hard shell is gone and only the soft membrane holds the egg together.
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