Finding out homogeneous and heterogeneous mixtures in Is Matter Pure – Class 9 Science Experiment

Chapter Name: Is Matter Pure

Activity Name: Finding out homogeneous and heterogeneous mixtures in Is Matter Pure

Activity Description:

This experiment aims to distinguish between homogeneous and heterogeneous mixtures using two test tubes filled with water and kerosene. A teaspoon of salt is added to both test tubes and stirred.

Required Items:

  1. Two test tubes
  2. Water
  3. Kerosene
  4. Salt
  5. Stirring rod

Step by Step Procedure:

  1. Take two clean test tubes.
  2. Fill one test tube with water and the other with kerosene, each about halfway.
  3. Add one teaspoon of salt to both test tubes.
  4. Stir both test tubes using the stirring rod.

Experiment Observations:

  1. In the test tube with water, the salt dissolves completely, forming a clear and uniform solution.
  2. In the test tube with kerosene, the salt does not dissolve and remains visible as separate particles, not forming a uniform mixture.

Precautions:

  • Ensure that the test tubes are clean and free from any contaminants before starting the experiment.
  • Use the same amount of water and kerosene in their respective test tubes to make the comparison valid.

Lesson Learnt from Experiment:

The experiment demonstrates the difference between homogeneous and heterogeneous mixtures. A homogeneous mixture is one in which the components are uniformly distributed and cannot be visually distinguished, while a heterogeneous mixture is one in which the components remain visibly separate.

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