Double displacement reaction in Chemical Reactions and Equations – Class 10 Science Experiment

Chapter Name: Chemical Reactions and Equations

Activity Name: Double displacement reaction in Chemical Reactions and Equations

Activity Description:

Double displacement reaction in Chemical Reactions and Equations - Class 10 Science Experiment
Double displacement reaction in Chemical Reactions and Equations - Class 10 Science Experiment

In this experiment, a double displacement reaction is performed between lead nitrate (Pb(NO3)2) and potassium iodide (KI) solutions.

When these two solutions are mixed, a yellow-colored precipitate, lead iodide (PbI2), is formed, which is insoluble in water. This reaction demonstrates the characteristics of a double displacement reaction, where the reactants exchange their constituents and form two products.

Required Items:

  1. Lead nitrate (Pb(NO3)2)
  2. Potassium iodide (KI)
  3. Distilled water
  4. Test tubes

Step by Step Procedure:

  1. Take a pinch of lead nitrate (Pb(NO3)2) and dissolve it in 5.0ml of distilled water in a test tube.
  2. Take a pinch of potassium iodide (KI) in a separate test tube and dissolve it in distilled water.
  3. Mix the lead nitrate solution with the potassium iodide solution.
  4. Observe the reaction mixture.

Experiment Observations:

  • A yellow-colored substance that is insoluble in water is formed as a precipitate. This precipitate is identified as lead iodide (PbI2).

Precautions:

  1. Handle the chemicals with care, and avoid direct contact with the skin or eyes.
  2. Perform the experiment in a well-ventilated area or a fume hood to avoid inhaling any fumes or vapors.
  3. Use clean and dry test tubes to ensure accurate observations.
  4. Dispose of the chemicals and the precipitate properly according to the guidelines for chemical waste disposal.

Lesson Learnt from Experiment:

This experiment demonstrates a double displacement reaction, where the lead nitrate and potassium iodide solutions react to form lead iodide as a precipitate. Double displacement reactions involve the exchange of ions between two reactants, resulting in the formation of two products.

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