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  • How can you remove the hard calcium carbonate layer of the egg without damaging its semipermeable membrane? Can this egg be inserted into a bottle with a narrow neck without distorting its shape? Explain the process involved.

How can you remove the hard calcium carbonate layer of the egg without damaging its semipermeable membrane? Can this egg be inserted into a bottle with a narrow neck without distorting its shape? Explain the process involved.

Answers (1)

This can be achieved as under:

  1. Take a mineral acid solution and put an egg inside it and leave it for 2 hours. Most of the outer shell will dissolve. Remove any remaining part with your fingers.
  2. Take a saturated solution (hypertonic) and lace the egg in it for 3 hours. Egg’s size reduces as the egg shrivels due to osmosis.
  3. Place the egg in a bottle with a narrow neck and fill water (hypotonic) in it. The egg will regain its shape.
     

 

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