Question

Help,define diffusion and osmosis with example​

Answer 1

Answer:

Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. ... Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration. The overall effect is to equalize concentration throughout the medium.

Examples of Osmosis: Examples include red blood cells swelling up when exposed to freshwater and plant root hairs taking up water.

Examples of Diffusion: Examples of diffusion include the scent of perfume filling a whole room and the movement of small molecules across a cell membrane.

Answer 2

Answer:

Diffusion :

1. Diffusion can occur in any medium

2. The diffusing molecules may be solids, liquids or gases.

3. Semipermeable membrane is not required.

Osmosis :

1. It occurs only in liquid medium.

2. It involves movement of solvent molecules only.

3. Semi permeable membrane is required.

osmosis is of two types:

1. Endosmosis :

The movement of water in the cell or a body through a semipermeable membrane is called endosmosis. It can be demonstrated as follows :

i)Take some raisins with stalks and put them in plain water in a beaker.

(ii) Observation : Raisins absorb water and swell. Raisins have high concentration of sugar than surrounding plain water. Because of this, water from the outside passing through semipermeable membrane enters into the cell. This is endosmosis.

2. Exosmosis :

The movement of water out from a cell or a body through a semipermeable membrane is called exosmosis. This can be demonstrated as follows :

(i) We place the swollen raisins (from above activity) into a beaker containing a concentrated solution of sugar or salt.

(ii) Observation : When swollen raisins are placed in concentrated sugar or salt solution, they shrink because the solution surrounding the raisins is having low water concentration. Thus, raisins loose water by osmosis, this process is called exosmosis.

Explanation:

hope it helps you<3