Biology, asked by Deveshbrain123, 1 year ago

what us osmosis and diffusion

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Answered by JaiPalani
1
osmosis is the movement of water particles through a semipermeable membrane
diffusion is the movement of particles from high concentration to lower concentration
Answered by sachinarora2001
1
What is the difference between diffusion and osmosis?

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Calvin Aung, In 7th grade and giving the Doctor next door the stumps

Answered May 7, 2017

OSMOSIS AND DIFFUSION

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 is the phenomenon of the movement of Solvent molecules from lower solute conc. to higher solute conc. through a semi-permeable membrane to make solute conc. equal on both sides. 
Osmosis is diffusion of water across a semi-permeable membrane.  Salt is too big to pass through a cell membrane, but water molecules can fit.  Since everything wants to reach equilibrium, the only thing that can flow to create equal concentrations is water. Eg.  Saline drips at the hospital - same ratio of salt water as is in your cells.
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