Describe the thistle funnel experiment of osmosis?
Answers
The movement of water molecules through a semipermeable membrane from the region of higher water concentration to the region of lesser water concentration is called osmosis. ... Concentrated sugar solution is filled in the funnel. Its level is marked on its neck. The thistle funnel is now placed in a beaker of water.
A physical phenomenon which takes place in all living organisms water molecules move between the cells or water shifts from one cell to the other through a semi - porous membrane is known as osmosis. When water molecules move from its higher concentration to lower concentration through a semi - porous membrane is also defined as osmosis. Osmosis can exhibited by the thistle funnel experiment. At first the mouth of a thistle funnel is tied with an egg membrane which acts as a semi - porous membrane. Then dilute sugar solution is added to the thistle funnel to a certain level. The mouth of the thistle funnel is kept in a beaker with the support of an iron stand. Now 3/4th of the beaker is filled with plain water. Similarly plain water is kept in a separate beaker and thistle funnel. Now it is left for 10 minutes for observation. It is seen that the level of the sugar solution increases while water level has not changed. This proves osmosis has occurred.