Explain the osmotic pressure of a solution with the help of thistle tube
Answers
Answer:Movement of water through the goat bladder or cellophane sheet into the thistle funnel takes place. ... The force, with which the solution level in the tube increases, arises from the pressure exerted by the diffusion of water molecules into the tube. This pressure is called osmotic pressure.
Explanation:
Answer
Experiment: To demonstrate osmosis using thistle funnel
Requirements: glass beaker, thistle funnel, a sheet of cellophane, thread, water, and sucrose or sugar solution.
Procedure
i) Thistle funnel is filled with sucrose solution and its mouth is tied with a parchment paper.
ii) Thistle funnel is kept inverted in a glass beaker that contains water.
iii) The initial level of sucrose is noted down.
iv) After some time the sucrose solution rises in the stem of a funnel that indicates that osmosis has occurred.
Observations: The level of water in thistle funnel increases.
Results: i) Movement of water through the cellophane sheet to thistle funnel can be seen.
ii) Water moves from the region of higher concentration to lower concentration.
iii) The movement water occurs through a semi-permeable membrane.
iv) The force due to which the solution in the tube increases is due to osmotic pressure.
v) Stability of water level in the funnel shows that water concentration in both the beakers as well as the funnel is the same and so osmosis stop
