how will you differentiate between diffusion and osmosis
Answers
DIFFUSION
Diffusion is the movement of particles (atoms, ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. A good example of diffusion is food colouring. If you place a drop of red food colouring in a beaker of water eventually the entire beaker of water will have a red tint. The food colouring moved through the water until it was equally distributed throughout the beaker. Diffusion takes place along a concentration gradient. A concentration gradient exists until the diffused substance is evenly distributed.
Other everyday examples of diffusion are:
1. Sugar will diffuse through tea until the entire cup of tea is sweet. (We stir the tea to speed up the diffusion.)
2. The odour of food cooking diffuses throughout the kitchen. If you open the kitchen door it will spread into the next room.
The movement of these molecules is said to be passive. No energy is needed to be provided. The natural kinetic energy of the particles supplies the energy.
Examples of diffusion in science are:
1. Carbon dioxide entering the stomata of leaves.
2. Oxygen diffusing out of the stomata and lenticels of leaves.
OSMOSIS
Osmosis is a special example of diffusion. It is the diffusion of a substance through a semipermeable membrane from a more dilute solution to a more concentrated solution. This process is also passive since no external energy is needed.
A semipermeable membrane is a barrier that permits the passage of some substances but not others. Cell membranes are described as selectively permeable because not only do they allow the passage of water but also allow the passage of certain solutes (dissolved substances).
Some major examples of osmosis:
Absorption of water by plant roots.
Reabsorption of water by the proximal and distal convoluted tubules of the nephron.
Reabsorption of tissue fluid into the venule ends of the blood capillaries.
Absorption of water by the alimentary canal — stomach, small intestine and the colon.
Answer:
OSMOSIS
Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.
Examples of Osmosis:- It include red blood cells swelling up when exposed to freshwater and plant root hairs taking up water. To see an easy demonstration of osmosis, soak gummy candies in water. The gel of the candies acts as a semipermeable membrane.
DIFFUSION
Diffusion is the net movement of anything from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in concentration. The concept of diffusion is widely used in many fields, including physics, chemistry, biology, sociology, economics, and finance.
Examples of Diffusion:- Diffusion include the scent of perfume filling a whole room and the movement of small molecules across a cell membrane. One of the simplest demonstrations of diffusion is adding a drop of food coloring to water. Although other transport processes do occur, diffusion is the key player.