Chemistry Practicals Class 9
Tyndall Effect
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About Simulation
- In this simulation, you will be able to observe the scattering of light in colloidal solutions, offering a precise replication of real-world experiments.
- You can manipulate parameters like concentration, particle size, and colloidal nature to observe the variations in the Tyndall effect.
- Utilize the simulation to identify and distinguish colloidal solutions based on their ability to exhibit the Tyndall effect.
- Explore the impact of different colloidal solutions, such as copper sulphate and water-milk mixtures, on light scattering, allowing you to understand the unique properties of various colloids.
- By engaging with the simulation, you will learn how the size and nature of particles in colloids directly contribute to the Tyndall effect.
Simulation Details
Description
Solution:
It is a homogeneous mixture of two or more substances. Solutions can be solid solutions, e.g. alloys; liquid solutions, e.g. lemonade; and gaseous solutions, e.g. air. A solution is made up of solute and solvent.
Based on the particle size, the solution is classified into three types:
- True solution: A solution that has solute particles of size smaller than 1 nm (10–9 m) in diameter and cannot be seen with the naked eye. They do not scatter a beam of light; the particles do not separate by filtration, and the particles do not settle down.
- Suspension: It is a heterogeneous mixture in which solute particles do not dissolve but remain suspended; particles can be seen with the naked eye, scatter a beam of light, and particles can be separated from the mixture by filtration.
- Colloidal solution: The solution appears to be homogeneous; the particles can scatter a beam of light, they do not settle down when left undisturbed, it is stable, and particles cannot be seen by the naked eye. The particles cannot be filtered. The size of particles is between 10–7 cm to 10–4 cm in diameter.
Tyndall effect:
The Tyndall effect, named after physicist John Tyndall, characterizes how colloidal particles scatter light directed at them. This phenomenon distinguishes colloids from other solutions and some fine suspensions. The intensity of scattered light depends on particle density and incident light frequency, making it a useful tool for identifying colloids.
Watch this video to learn more about chemistry.
Requirements for this Science Experiment
⦁ Copper sulphate solution ⦁ Milk-water mixture ⦁ Torch
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