Name: Process of Sublimation
Uploaded: 2019-07-19
Duration: 3 min 57 s
Description: Sublimation is converting a substance directly from the solid to the gaseous state of matter without passing through the liquid state. Watch this video.

Question

Show experimentally that matter is made up of small particles.

Accepted Answer

Aim: To show that matter is made up of small particles.

Materials Required: Crystals of ${KMnO}_{4}$ , water, 4 separate beakers.

Procedure :

• Take 2-3 crystals of ${KMnO}_{4}$ and dissolve them in 100 ml of water in beaker 1.

• Take 10 ml of solution from beaker 1 and put it into 100 ml of water in beaker 2 and observe the colour of the solution.
• Take 10 ml of solution from beaker 2 and put it into 100 ml of water in beaker 3 and observe the colour of the solution.

• Take 10 ml of solution from beaker 2 and put it into 100 ml of water in beaker 4 and observe the colour of the solution.

The experimental setup is as follows:

Observations: The colour of the solution remains purple but it gets lighter and fainter in all the beakers.
Conclusion: This experiment shows that just a few crystals of potassium permanganate can colour a large volume of water (about 1000 L).

So we conclude that there must be millions of tiny particles in just one crystal of potassium permanganate, which keeps on dividing themselves into smaller and smaller particles.

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