Question

examples ofosmosis

Answer 1

osmosis is the phenomenon in which the two solutions of two different concentrations are separated by the semi permeable membrane. the molecules of the solvent move from their higher concentration to their lower concentration till the concentration of both the solutions becomes equal.

e.g: take a thistle funnel and cover its mouth with a parchment paper. and fill it with concentrated sugar solution.

place thistle funnel in a beaker containing water and mark the level of sugar solution in the stem of thistle funnel.

leave the apparatus undisturbed for 4-5 hours.

you will observe that the level of sugar solution in the stem rises and the level of water decreases as water passes through the parchment paper into the sugar solutin. it it because of osmosis

Answer 2

that help?

Answer 3

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 of leaves.

Does that help?