Chemistry Practicals Class 9

How small are the particles of matter?

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  • Engaging simulations with easy-to-teach instructions

About Simulation

  • This simulation focuses on showcasing the small size of matter particles by using potassium permanganate through interactive visualizations.
  • It demonstrates the dissolution of potassium permanganate particles at a molecular level, illustrating how these tiny particles disperse in water and give rise to colourful solutions.
  • Through the simulation, you gain a deeper understanding of the concept of particle size in matter, particularly how minuscule particles contribute to the properties of solutions.
  • You can explore the dissolution process of potassium permanganate particles in water, observing firsthand how they disperse and interact with the solvent molecules.

Chemistry Practical Class

  • By interacting with the simulation, you can grasp the intricate relationship between particle size and the formation of solutions, gaining insights into how the size and nature of particles affect solution properties.

Simulation Details

Duration – 30 Minutes
Easily Accessible
Languages – Odia & English
Platforms – Android & Windows


The particle theory of matter or the kinetic molecular theory of matter describes the microscopic properties of atoms (or molecules) and their interactions, which result in observable macroscopic properties (such as pressure, volume, and temperature). The theory can be used to explain why matter exists in different phases (solid, liquid, and gas), as well as how matter can change from one phase to the next.

Postulates of Particle Theory of Matter

  • All matter is made up of tiny particles known as atoms.
  • Particles of matter are constantly in motion.
  • Particles of matter attract each other.
  • As temperature increases, particles of matter move faster.
  • Atoms of the same element are essentially identical, and atoms of different elements are different.

All matter is made up of tiny particles known as atoms.

Individual atoms or groups of atoms known as molecules make up the particles. Atoms are the most fundamental and smallest part that can exist of an element. A molecule is formed when two or more atoms are chemically bonded together.

Particles of matter are constantly in motion.

In the case of solids, the particles vibrate at their position. Particles in liquids and gases move from one location to another.

For example –

  • We can smell the food being prepared in the kitchen from afar because the tiny particles of food vapour mix with the air and move in all directions continuously through the process of diffusion.
  • A few crystals of potassium permanganate are evenly distributed in the water.

Chemistry Practical Class

Watch this video to learn more about chemistry.

Requirements for this Science Experiment

Potassium permanganate crystals Distilled water Spatula Beaker Measuring cylinder

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