Can we separate mixture of Copper sulphate and Aluminum in Is Matter Pure – Class 9 Science Experiment

Chapter Name: Is Matter Pure

Activity Name: Can we separate mixture of Copper sulphate and Aluminum in Is Matter Pure

Activity Description:

The experiment involves taking a concentrated solution of copper sulphate in a beaker and introducing a piece of aluminum foil into it. Over time, a layer of copper gets deposited on the aluminum foil, and the solution turns colorless.

The observation demonstrates a chemical reaction between copper ions in the solution and aluminum, resulting in the separation of copper metal. This indicates that copper sulphate is a compound and not a mixture, as its components (copper, sulfur, and oxygen) cannot be physically separated.

Required Items:

Copper sulphate solution, beaker, aluminum foil

Step by Step Procedure:

  1. Take a beaker with a concentrated solution of copper sulphate.
  2. Place a piece of aluminum foil into the solution.
  3. Wait for some time and observe the changes in the solution.
  4. You will notice a layer of copper forming on the aluminum foil, and the solution will become colorless.

Experiment Observations:

  • Copper starts depositing on the aluminum foil.
  • The color of the solution changes to colorless.

Precautions:

  • Handle copper sulphate with care as it may cause irritation to the skin and eyes.
  • Perform the experiment in a well-ventilated area to avoid inhaling any fumes.
  • Dispose of the chemicals properly after the experiment.

Lesson Learnt from Experiment:

The experiment demonstrates that copper sulphate is a compound, not a mixture, as it cannot be separated into its individual components (copper, sulfur, and oxygen) by physical processes. The chemical reaction between copper ions and aluminum results in the deposition of copper metal, illustrating the unique properties of compounds and their constituents.

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