Question

define diffusion...with examples.​

Answer 1

Explanation:

Diffusion is the process of movement of molecules under a concentration gradient. It is an important process occurring in all living beings. Diffusion helps in the movement of substances in and out of the cells. The molecules move from a region of higher concentration to a region of lower concentration until the concentration becomes equal throughout.

Liquid and gases undergo diffusion as the molecules are able to move randomly.

Example:

Take water in a beaker. Add a few copper sulfate crystals at one place and leave it as it is for some time without disturbing it. After some time we can see that beaker contains a uniformly coloured solution. Here, both water and copper sulfate diffuse independently. With this experiment, we can infer that solutes move from a higher concentration to the lower concentration in a solution.

Answer 2

Explanation:

Simple diffusion is a type of passive transport which, as the name suggests, is simply the movement of solute which occurs when its electrochemical potentials on the two sides of a permeable barrier are different.

Some examples of diffusion are:

1. One of the classic examples of simple diffusion is the movement of gases across the membrane in animals.
2. Oxygen and carbon dioxide dissolved in the blood is exchanged by the process of simple diffusion.
3. Depending on the concentration gradient of these gases in the cells, the direction of the movement of gases is determined.