What is Osmosis Class 9 with Examples

Osmosis is the process where water molecules move from an area of low solute concentration to an area of high solute concentration through a semi-permeable membrane. This movement aims to balance the solute concentrations on both sides of the membrane. Osmosis is crucial for maintaining cell turgidity and regulating the movement of fluids in and out of cells, ensuring proper cell function and overall homeostasis in living organisms. For more details also read the Difference between Diffusion and Osmosis

Examples of Osmosis

Plant Roots Absorbing Water: Plant roots absorb water from the soil through osmosis. The water moves from the soil (low solute concentration) into the root cells (high solute concentration). Red Blood Cells in Different Solutions: When red blood cells are placed in a hypertonic solution (high solute concentration), water moves out of the cells, causing them to shrink. In a hypotonic solution (low solute concentration), water moves into the cells, causing them to swell and potentially burst. Preserving Food with Salt: When salt is applied to foods like meat or vegetables, it creates a hypertonic environment. Water moves out of the food cells by osmosis, dehydrating them and inhibiting the growth of bacteria, thus preserving the food.