Study the phenomenon of osmosis

Our Objective

To study the Phenomenon of Osmosis

 

The Theory

Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a semipermeable membrane. 

 

Importance of Osmosis 

  1. Osmosis helps in the transport of nutrients and the release of metabolic waste products. 
  2. It maintains the turgidity of cells. 
  3. The cell membrane of both plants and animals forms a selective barrier between the cell and its environment and does not allow toxic substances from the surroundings to enter the cell.  
  4. Osmosis induces cell turgor which regulates the movement of plants and plant parts. 
  5. The selective permeability allows the cell to regulate the flow of necessary substances into and out of the cell.  
  6. In plants, osmosis is also responsible for absorbing water and minerals from the soil by using the semipermeable membrane of the root. 

 

Osmosis in Different Types of solution 

  1. Hypertonic Solution

    If we place living cells in a hypertonic solution the water moves out of the cell because of the lower concentration of water than the cell. The cell then shrinks and becomes plasmolyzed. 
  2. Hypotonic Solution

    If we place living cells in a hypotonic solution the water moves into the cell because of the higher concentration of water than in the cell. The cell then swells to become turgid. 
  3. Isotonic Solution

    If we place living cells in an isotonic solution, it won’t show any change because of the equal concentration of water on either side. The cell remains the same size.  

 

Types of Osmosis 

  1. Endosmosis 

    When a substance is placed in a hypotonic solution, the solvent molecules move inside the cell and the cell becomes turgid or undergoes de-plasmolysis. This is known as endosmosis. 
  2. Exosmosis 

    When a substance is placed in a hypertonic solution, the solvent molecules move outside the cell and the cell becomes flaccid or undergoes plasmolysis. This is known as exosmosis. 

 

Learning Outcomes 

  • Students can understand the concept of osmosis. 
  • Students can understand the importance of osmosis and the properties that it displays when it is in different types of solution
  • Students will be able to do the experiment more accurately in the real lab once they understand the steps through the animation and simulation.