Heating of calcium carbonite in Chemical Reactions and Equations – Class 10 Science Experiment

Chapter Name: Chemical Reactions and Equations

Activity Name: Heating of calcium carbonite in Chemical Reactions and Equations

Activity Description:

Required Items:

1. Calcium carbonate (lime stone)
2. Boiling tube
3. Spirit lamp or burner
4. Matchstick

Step by Step Procedure:

1. Take a small amount of calcium carbonate (lime stone) and place it in a boiling tube.
2. Heat the boiling tube over a flame from a spirit lamp or burner.
3. While the calcium carbonate is being heated, carefully bring a burning matchstick near the mouth of the boiling tube.
4. Observe what happens when the burning matchstick comes in contact with the evolved gas.

Experiment Observations:

• The calcium carbonate in the boiling tube decomposes upon heating.
• A gas is evolved during the reaction.
• When a burning matchstick is brought near the evolved gas, it gets extinguished, indicating the presence of carbon dioxide.

Precautions:

1. Handle the flame and heated boiling tube with care to avoid accidents.
2. Perform the experiment in a well-ventilated area to avoid inhalation of gases.
3. Use a small amount of calcium carbonate to prevent excessive gas evolution.

Lesson Learnt from Experiment:

This experiment demonstrates a thermal decomposition reaction where calcium carbonate breaks down into calcium oxide and carbon dioxide gas when heated. The extinguishing of the matchstick confirms the presence of carbon dioxide, illustrating how thermal decomposition reactions can produce new substances through heating.