How will you study endosmosis and exosmosis by doing an experiment with egg or raisin?
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study with the help of raisin:
when raisin is put in water ....water enters inside it as water moves from higher concentration to lower concentration..... it is an example of endosmosis .....but when it is put in salt solution opposite of this happens .....this is called exosmosis
when raisin is put in water ....water enters inside it as water moves from higher concentration to lower concentration..... it is an example of endosmosis .....but when it is put in salt solution opposite of this happens .....this is called exosmosis
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Study with the help of egg:-
1. Make a small hole at one end of the egg with the help of a scalpel and then remove its inner contents.
2. Wash the shell of the egg with water and then attach a narrow glass tube about 1 foot (30 cm) in length through the hole by sealing wax. Lac should be used for sealing.
3. Dissolve about 1/3rd of the calcareous shell of the egg from the side opposite to the hole with concentrated HCl to expose the membrane and wash in water. The shell is made of CaCO3 and so is dissolved by HCl.
4. Fill the inner cavity of the egg with sucrose solution through the tube and mark the level of the solution inside the tube.
5. Place the whole thing in a beaker containing water and hold the set erect by stand and clamp.
You will observe that rise of liquid level inside the Egg Osmoscope is due to endosmosis of water through the egg membrane.
Hope it helped you !
1. Make a small hole at one end of the egg with the help of a scalpel and then remove its inner contents.
2. Wash the shell of the egg with water and then attach a narrow glass tube about 1 foot (30 cm) in length through the hole by sealing wax. Lac should be used for sealing.
3. Dissolve about 1/3rd of the calcareous shell of the egg from the side opposite to the hole with concentrated HCl to expose the membrane and wash in water. The shell is made of CaCO3 and so is dissolved by HCl.
4. Fill the inner cavity of the egg with sucrose solution through the tube and mark the level of the solution inside the tube.
5. Place the whole thing in a beaker containing water and hold the set erect by stand and clamp.
You will observe that rise of liquid level inside the Egg Osmoscope is due to endosmosis of water through the egg membrane.
Hope it helped you !
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