**Introduction**

The observation that even two or three crystals of potassium permanganate can impart color to a very large volume of water illustrates the characteristic of particles of matter known as dispersion.

**Dispersion of Particles**

Dispersion refers to the scattering of particles throughout a medium. In the case of potassium permanganate crystals, when they are added to water, the particles of the crystal become dispersed or scattered throughout the water, resulting in the water acquiring a distinct color.

**Explanation**

When two or three crystals of potassium permanganate are added to water, the purple color of the crystals is imparted to the water. This occurs due to the dispersion of the particles of potassium permanganate throughout the water.

- **Particle Size**: The particles of potassium permanganate are very small, allowing them to disperse easily in water. The smaller the particle size, the greater the dispersion.

- **Solubility**: Potassium permanganate is highly soluble in water, meaning that the crystals dissolve readily. As the crystals dissolve, the individual particles are released into the water, leading to dispersion.

- **Random Motion**: The particles of potassium permanganate in water exhibit random motion due to Brownian motion. This motion causes the particles to spread out and become evenly distributed in the water, enhancing dispersion.

- **Intermolecular Forces**: Potassium permanganate molecules interact with water molecules through intermolecular forces such as hydrogen bonding. These forces help to disperse the particles and prevent them from clumping together.

- **Higher Concentration**: The concentration of potassium permanganate in the crystals is higher compared to the volume of water. This concentration gradient drives the dispersion process, as the higher concentration particles diffuse into the lower concentration water.

**Conclusion**

The observation that even two or three crystals of potassium permanganate can impart color to a very large volume of water illustrates the characteristic of dispersion. The small particle size, solubility, random motion, intermolecular forces, and concentration gradient all contribute to the dispersion of potassium permanganate particles throughout the water, resulting in the water acquiring a distinct color.

particle nature of matter i.e. atoms can fill the inter molecular space is other in this experiment