HS 1st year : Chemistry chapter 1 experiments

 

Experiment: Law of Conservation of Mass

Objective:

To demonstrate the Law of Conservation of Mass, which states that mass cannot be created or destroyed in a chemical reaction.

Materials Required:

• A beaker

• Vinegar (acetic acid)

• Baking soda (sodium bicarbonate)

• A digital weighing balance

• A small balloon

• A conical flask

Procedure:

1. Measure the mass of the empty conical flask using the digital weighing balance.

2. Add a measured amount of vinegar (20 ml) to the conical flask.

3. Measure the mass of the balloon.

4. Add a measured amount of baking soda (5 grams) to the balloon.

5. Carefully stretch the balloon over the mouth of the conical flask without letting the baking soda fall into the vinegar.

6. Weigh the entire setup (flask with vinegar, balloon with baking soda) and record the total mass.

7. Lift the balloon, allowing the baking soda to fall into the vinegar. This will produce carbon dioxide gas, causing the balloon to inflate.

8. After the reaction is complete, weigh the entire setup again.

Observation:

• The mass of the setup (flask, vinegar, baking soda, and balloon) before and after the reaction should remain the same.

Conclusion:

• This experiment demonstrates the Law of Conservation of Mass, as the total mass remains constant before and after the chemical reaction.