Question

Osmosis with an egg (a) Remove the shell of an egg by dissolving it in dilute hydrochloric acid. The shell is mostly calcium carbonate. A thin outer skin now encloses the egg. Put the egg in pure water and observe after 5 minutes. What do you observe? (b) Place a similar de-shelled egg in a concentraed salt solution and observe for 5 minutes. The egg shrinks. Why? Water passes out of the egg soution into the salt solution because the salt is more concentrated.

Answer 1

Answer:

The shell of an egg is basically calcium carbonate. So when it is placed in dilute HCl, the shell dissolves. Now the inner thin covering is exposed which acts as a semi-permeable membrane. When this de-shelled egg is placed in water, it swells up.

Answer 2

Answer:(a) there will be a thin membrane surrounding the egg content .and there will be egg yolk in the middle.

(b)The shell of an egg is basically calcium carbonate. So when it is placed in dilute HCl, the shell dissolves. Now the inner thin covering is exposed which acts as a semi-permeable membrane. When this de-shelled egg is placed in water, it swells up.

Explanation: