Egg shell removal

Remove the shell from an egg with a chemical reaction
Science content
Chemistry: Atoms, Molecules (3-7)
Chemistry: Chemical Changes (2, 7)
  • egg
  • vinegar
  • mug or glass jar

Submerge an uncooked egg in vinegar.
Wait a few days to a week.

The shell will bubble as the vinegar reacts with the calcium carbonate in the shell, releasing carbon dioxide gas:
CaCO3 + 2CH3COOH -> Ca(CH3COO)2 + H2O + CO2

The hard shell reacts away completely, leaving the egg surrounded just by the outer membrane.
The egg is soft, but still intact.

Grades taught
Gr 3
Gr 5
Teaching site
JEMZ+ After school science