Verifying The Law Of Conservation Of Mass Through Chemical Reactions

The video tutorial explains the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction. It describes an experiment to verify this law using sodium sulphate and barium chloride solutions. The tutorial outlines the materials required, the procedure to follow, and the precautions to take. The experiment demonstrates that the total mass of reactants equals the total mass of products, confirming the law.

Who is credited with proving the Law of Conservation of Mass?

• Dmitri Mendeleev

• Albert Einstein

• Antoine Laurent Lavoisier

• Isaac Newton

What does the Law of Conservation of Mass state about matter in a chemical reaction?

• Matter can change into energy

• Matter can neither be created nor destroyed

• Matter can be destroyed

• Matter can be created

Which of the following is NOT required for the experiment?

• Sodium sulphate solution

• Barium chloride solution

• 250 ml conical flask

• Bunsen burner

What is the purpose of the thread in the experiment setup?

• To heat the solutions

• To measure the solutions

• To stir the solutions

• To tie the test tube

Why is it important to weigh the flask before mixing the solutions?

• To verify the mass of the reactants

• To measure the volume

• To ensure the solutions are mixed

• To check the temperature

What is formed when barium chloride solution mixes with sodium sulphate solution?

• Barium sulphate

• Barium nitrate

• Sodium carbonate

• Sodium hydroxide

What should be done after mixing the solutions to complete the reaction?

• Wait for 10 minutes

• Wait for 15 minutes

• Wait for 20 minutes

• Wait for 5 minutes

What is the main precaution to take when setting up the apparatus?

• Ensure the solutions are cooled

• Ensure the solutions are heated

• Ensure the solutions do not mix prematurely

• Ensure the solutions are mixed immediately

What is the final step to verify the Law of Conservation of Mass?

• Add more reactants

• Measure the temperature

• Weigh the flask again

• Remove the cork

What should be done to start the chemical reaction?

• Heat the flask

• Cool the flask

• Shake the flask vigorously

• Tilt and swirl the flask