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What is Osmosis?

Hello viewers, we are going to look at osmosis, the procedure, requirements and it’s observations.  It is very important to know how to write an experiment on physics, chemistry and biology.  In your text book it is written in instruction format, which you can not write in your laboratory note book or in your examination.  You have got to write in Past Tense and Passive voice.  Lets go through the definition first.


The movement of solvent molecules of a substance (solid, liquid and gas) from a region of lower concentration to the region of higher concentration through semipermeable membrane.


  1. Aim of experiment:  To demonstrate the process of osmosis


  1. Requirements: Concentrated sugar solution, distilled water, thistle funnel, parchment paper, thread, beaker, clamp stand


  1. Procedure: A thistle funnel was taken.  The mouth of the thistle funnel was covered with a parchment paper and was tied properly.  In a beaker some distilled water was poured.  Concentrated sugar solution was poured into the thistle funnel.  The level of the sugar solution on the stem of the thistle funnel was marked.  The thistle funnel was inverted into the beaker containing distilled water and it was fixed with help of clamp and stand.  The experimental set up was left for few hours.


  1. Observation

After a hours the level of sugar solution in the thistle funnel in the experimental set up rises.  The level of water in the beaker dropped slightly.  If tasted the water in the beaker did not taste sweet.


  1. Inference

This rise of level of concentrated sugar solution is due to osmosis of water from the beaker into the funnel though the parchment paper serving as semi-permeable membrane allowing the solvent molecules (water) to pass through it from a region of higher concentration to a region of lower concentration.


  1. Precaution
  2. The parchment paper


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Hi viewers My name is Partha Pratim Goswami, (PpG) I am a teacher by profession. I have been teaching biology, chemistry and physics, sometimes mathematics also for last sixteen years. I would like to share my entire experience with all the viewers across the world through YouTube, which I think is an amazing platform to share all my experiences.

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